81840780

素因数分解:

$2^2\times 3^4\times 5^1\times 7^2\times {\mathrm{1031}}^1$

素因数の和:1066

約数の個数: 180

約数和(自身を含む): 298943568

約数和(自身を除く): 217102788

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 27, 28, 30, 35, 36, 42, 45, 49, 54, 60, 63, 70, 81, 84, 90, 98, 105, 108, 126, 135, 140, 147, 162, 180, 189, 196, 210, 245, 252, 270, 294, 315, 324, 378, 405, 420, 441, 490, 540, 567, 588, 630, 735, 756, 810, 882, 945, 980, 1031, 1134, 1260, 1323, 1470, 1620, 1764, 1890, 2062, 2205, 2268, 2646, 2835, 2940, 3093, 3780, 3969, 4124, 4410, 5155, 5292, 5670, 6186, 6615, 7217, 7938, 8820, 9279, 10310, 11340, 12372, 13230, 14434, 15465, 15876, 18558, 19845, 20620, 21651, 26460, 27837, 28868, 30930, 36085, 37116, 39690, 43302, 46395, 50519, 55674, 61860, 64953, 72170, 79380, 83511, 86604, 92790, 101038, 108255, 111348, 129906, 139185, 144340, 151557, 167022, 185580, 194859, 202076, 216510, 252595, 259812, 278370, 303114, 324765, 334044, 389718, 417555, 433020, 454671, 505190, 556740, 584577, 606228, 649530, 757785, 779436, 835110, 909342, 974295, 1010380, 1169154, 1299060, 1364013, 1515570, 1670220, 1818684, 1948590, 2273355, 2338308, 2728026, 2922885, 3031140, 3897180, 4092039, 4546710, 5456052, 5845770, 6820065, 8184078, 9093420, 11691540, 13640130, 16368156, 20460195, 27280260, 40920390, 81840780]

約数ペア:

[(1, 81840780), (2, 40920390), (3, 27280260), (4, 20460195), (5, 16368156), (6, 13640130), (7, 11691540), (9, 9093420), (10, 8184078), (12, 6820065), (14, 5845770), (15, 5456052), (18, 4546710), (20, 4092039), (21, 3897180), (27, 3031140), (28, 2922885), (30, 2728026), (35, 2338308), (36, 2273355), (42, 1948590), (45, 1818684), (49, 1670220), (54, 1515570), (60, 1364013), (63, 1299060), (70, 1169154), (81, 1010380), (84, 974295), (90, 909342), (98, 835110), (105, 779436), (108, 757785), (126, 649530), (135, 606228), (140, 584577), (147, 556740), (162, 505190), (180, 454671), (189, 433020), (196, 417555), (210, 389718), (245, 334044), (252, 324765), (270, 303114), (294, 278370), (315, 259812), (324, 252595), (378, 216510), (405, 202076), (420, 194859), (441, 185580), (490, 167022), (540, 151557), (567, 144340), (588, 139185), (630, 129906), (735, 111348), (756, 108255), (810, 101038), (882, 92790), (945, 86604), (980, 83511), (1031, 79380), (1134, 72170), (1260, 64953), (1323, 61860), (1470, 55674), (1620, 50519), (1764, 46395), (1890, 43302), (2062, 39690), (2205, 37116), (2268, 36085), (2646, 30930), (2835, 28868), (2940, 27837), (3093, 26460), (3780, 21651), (3969, 20620), (4124, 19845), (4410, 18558), (5155, 15876), (5292, 15465), (5670, 14434), (6186, 13230), (6615, 12372), (7217, 11340), (7938, 10310), (8820, 9279)]