19881540

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{509}}^1$

素因数の和:562

約数の個数: 144

約数和(自身を含む): 71285760

約数和(自身を除く): 51404220

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 31, 35, 36, 42, 45, 60, 62, 63, 70, 84, 90, 93, 105, 124, 126, 140, 155, 180, 186, 210, 217, 252, 279, 310, 315, 372, 420, 434, 465, 509, 558, 620, 630, 651, 868, 930, 1018, 1085, 1116, 1260, 1302, 1395, 1527, 1860, 1953, 2036, 2170, 2545, 2604, 2790, 3054, 3255, 3563, 3906, 4340, 4581, 5090, 5580, 6108, 6510, 7126, 7635, 7812, 9162, 9765, 10180, 10689, 13020, 14252, 15270, 15779, 17815, 18324, 19530, 21378, 22905, 30540, 31558, 32067, 35630, 39060, 42756, 45810, 47337, 53445, 63116, 64134, 71260, 78895, 91620, 94674, 106890, 110453, 128268, 142011, 157790, 160335, 189348, 213780, 220906, 236685, 284022, 315580, 320670, 331359, 441812, 473370, 552265, 568044, 641340, 662718, 710055, 946740, 994077, 1104530, 1325436, 1420110, 1656795, 1988154, 2209060, 2840220, 3313590, 3976308, 4970385, 6627180, 9940770, 19881540]

約数ペア:

[(1, 19881540), (2, 9940770), (3, 6627180), (4, 4970385), (5, 3976308), (6, 3313590), (7, 2840220), (9, 2209060), (10, 1988154), (12, 1656795), (14, 1420110), (15, 1325436), (18, 1104530), (20, 994077), (21, 946740), (28, 710055), (30, 662718), (31, 641340), (35, 568044), (36, 552265), (42, 473370), (45, 441812), (60, 331359), (62, 320670), (63, 315580), (70, 284022), (84, 236685), (90, 220906), (93, 213780), (105, 189348), (124, 160335), (126, 157790), (140, 142011), (155, 128268), (180, 110453), (186, 106890), (210, 94674), (217, 91620), (252, 78895), (279, 71260), (310, 64134), (315, 63116), (372, 53445), (420, 47337), (434, 45810), (465, 42756), (509, 39060), (558, 35630), (620, 32067), (630, 31558), (651, 30540), (868, 22905), (930, 21378), (1018, 19530), (1085, 18324), (1116, 17815), (1260, 15779), (1302, 15270), (1395, 14252), (1527, 13020), (1860, 10689), (1953, 10180), (2036, 9765), (2170, 9162), (2545, 7812), (2604, 7635), (2790, 7126), (3054, 6510), (3255, 6108), (3563, 5580), (3906, 5090), (4340, 4581)]