20958280

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{17}}^2\times {\mathrm{37}}^1$

素因数の和:96

約数の個数: 144

約数和(自身を含む): 59846580

約数和(自身を除く): 38888300

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 17, 20, 28, 34, 35, 37, 40, 49, 56, 68, 70, 74, 85, 98, 119, 136, 140, 148, 170, 185, 196, 238, 245, 259, 280, 289, 296, 340, 370, 392, 476, 490, 518, 578, 595, 629, 680, 740, 833, 952, 980, 1036, 1156, 1190, 1258, 1295, 1445, 1480, 1666, 1813, 1960, 2023, 2072, 2312, 2380, 2516, 2590, 2890, 3145, 3332, 3626, 4046, 4165, 4403, 4760, 5032, 5180, 5780, 6290, 6664, 7252, 8092, 8330, 8806, 9065, 10115, 10360, 10693, 11560, 12580, 14161, 14504, 16184, 16660, 17612, 18130, 20230, 21386, 22015, 25160, 28322, 30821, 33320, 35224, 36260, 40460, 42772, 44030, 53465, 56644, 61642, 70805, 72520, 74851, 80920, 85544, 88060, 106930, 113288, 123284, 141610, 149702, 154105, 176120, 213860, 246568, 283220, 299404, 308210, 374255, 427720, 523957, 566440, 598808, 616420, 748510, 1047914, 1232840, 1497020, 2095828, 2619785, 2994040, 4191656, 5239570, 10479140, 20958280]

約数ペア:

[(1, 20958280), (2, 10479140), (4, 5239570), (5, 4191656), (7, 2994040), (8, 2619785), (10, 2095828), (14, 1497020), (17, 1232840), (20, 1047914), (28, 748510), (34, 616420), (35, 598808), (37, 566440), (40, 523957), (49, 427720), (56, 374255), (68, 308210), (70, 299404), (74, 283220), (85, 246568), (98, 213860), (119, 176120), (136, 154105), (140, 149702), (148, 141610), (170, 123284), (185, 113288), (196, 106930), (238, 88060), (245, 85544), (259, 80920), (280, 74851), (289, 72520), (296, 70805), (340, 61642), (370, 56644), (392, 53465), (476, 44030), (490, 42772), (518, 40460), (578, 36260), (595, 35224), (629, 33320), (680, 30821), (740, 28322), (833, 25160), (952, 22015), (980, 21386), (1036, 20230), (1156, 18130), (1190, 17612), (1258, 16660), (1295, 16184), (1445, 14504), (1480, 14161), (1666, 12580), (1813, 11560), (1960, 10693), (2023, 10360), (2072, 10115), (2312, 9065), (2380, 8806), (2516, 8330), (2590, 8092), (2890, 7252), (3145, 6664), (3332, 6290), (3626, 5780), (4046, 5180), (4165, 5032), (4403, 4760)]