21957390

素因数分解:

$2^1\times 3^2\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{383}}^1$

素因数の和:423

約数の個数: 144

約数和(自身を含む): 71705088

約数和(自身を除く): 49747698

約数列:

[1, 2, 3, 5, 6, 7, 9, 10, 13, 14, 15, 18, 21, 26, 30, 35, 39, 42, 45, 49, 63, 65, 70, 78, 90, 91, 98, 105, 117, 126, 130, 147, 182, 195, 210, 234, 245, 273, 294, 315, 383, 390, 441, 455, 490, 546, 585, 630, 637, 735, 766, 819, 882, 910, 1149, 1170, 1274, 1365, 1470, 1638, 1911, 1915, 2205, 2298, 2681, 2730, 3185, 3447, 3822, 3830, 4095, 4410, 4979, 5362, 5733, 5745, 6370, 6894, 8043, 8190, 9555, 9958, 11466, 11490, 13405, 14937, 16086, 17235, 18767, 19110, 24129, 24895, 26810, 28665, 29874, 34470, 34853, 37534, 40215, 44811, 48258, 49790, 56301, 57330, 69706, 74685, 80430, 89622, 93835, 104559, 112602, 120645, 149370, 168903, 174265, 187670, 209118, 224055, 241290, 243971, 281505, 313677, 337806, 348530, 448110, 487942, 522795, 563010, 627354, 731913, 844515, 1045590, 1219855, 1463826, 1568385, 1689030, 2195739, 2439710, 3136770, 3659565, 4391478, 7319130, 10978695, 21957390]

約数ペア:

[(1, 21957390), (2, 10978695), (3, 7319130), (5, 4391478), (6, 3659565), (7, 3136770), (9, 2439710), (10, 2195739), (13, 1689030), (14, 1568385), (15, 1463826), (18, 1219855), (21, 1045590), (26, 844515), (30, 731913), (35, 627354), (39, 563010), (42, 522795), (45, 487942), (49, 448110), (63, 348530), (65, 337806), (70, 313677), (78, 281505), (90, 243971), (91, 241290), (98, 224055), (105, 209118), (117, 187670), (126, 174265), (130, 168903), (147, 149370), (182, 120645), (195, 112602), (210, 104559), (234, 93835), (245, 89622), (273, 80430), (294, 74685), (315, 69706), (383, 57330), (390, 56301), (441, 49790), (455, 48258), (490, 44811), (546, 40215), (585, 37534), (630, 34853), (637, 34470), (735, 29874), (766, 28665), (819, 26810), (882, 24895), (910, 24129), (1149, 19110), (1170, 18767), (1274, 17235), (1365, 16086), (1470, 14937), (1638, 13405), (1911, 11490), (1915, 11466), (2205, 9958), (2298, 9555), (2681, 8190), (2730, 8043), (3185, 6894), (3447, 6370), (3822, 5745), (3830, 5733), (4095, 5362), (4410, 4979)]