20821090920

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{401}}^1\times {\mathrm{61813}}^1$

素因数の和:62235

約数の個数: 128

約数和(自身を含む): 71565776640

約数和(自身を除く): 50744685720

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 401, 420, 802, 840, 1203, 1604, 2005, 2406, 2807, 3208, 4010, 4812, 5614, 6015, 8020, 8421, 9624, 11228, 12030, 14035, 16040, 16842, 22456, 24060, 28070, 33684, 42105, 48120, 56140, 61813, 67368, 84210, 112280, 123626, 168420, 185439, 247252, 309065, 336840, 370878, 432691, 494504, 618130, 741756, 865382, 927195, 1236260, 1298073, 1483512, 1730764, 1854390, 2163455, 2472520, 2596146, 3461528, 3708780, 4326910, 5192292, 6490365, 7417560, 8653820, 10384584, 12980730, 17307640, 24787013, 25961460, 49574026, 51922920, 74361039, 99148052, 123935065, 148722078, 173509091, 198296104, 247870130, 297444156, 347018182, 371805195, 495740260, 520527273, 594888312, 694036364, 743610390, 867545455, 991480520, 1041054546, 1388072728, 1487220780, 1735090910, 2082109092, 2602636365, 2974441560, 3470181820, 4164218184, 5205272730, 6940363640, 10410545460, 20821090920]

約数ペア:

[(1, 20821090920), (2, 10410545460), (3, 6940363640), (4, 5205272730), (5, 4164218184), (6, 3470181820), (7, 2974441560), (8, 2602636365), (10, 2082109092), (12, 1735090910), (14, 1487220780), (15, 1388072728), (20, 1041054546), (21, 991480520), (24, 867545455), (28, 743610390), (30, 694036364), (35, 594888312), (40, 520527273), (42, 495740260), (56, 371805195), (60, 347018182), (70, 297444156), (84, 247870130), (105, 198296104), (120, 173509091), (140, 148722078), (168, 123935065), (210, 99148052), (280, 74361039), (401, 51922920), (420, 49574026), (802, 25961460), (840, 24787013), (1203, 17307640), (1604, 12980730), (2005, 10384584), (2406, 8653820), (2807, 7417560), (3208, 6490365), (4010, 5192292), (4812, 4326910), (5614, 3708780), (6015, 3461528), (8020, 2596146), (8421, 2472520), (9624, 2163455), (11228, 1854390), (12030, 1730764), (14035, 1483512), (16040, 1298073), (16842, 1236260), (22456, 927195), (24060, 865382), (28070, 741756), (33684, 618130), (42105, 494504), (48120, 432691), (56140, 370878), (61813, 336840), (67368, 309065), (84210, 247252), (112280, 185439), (123626, 168420)]