20102840

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^2\times {\mathrm{37}}^1\times {\mathrm{47}}^1$

素因数の和:129

約数の個数: 96

約数和(自身を含む): 50397120

約数和(自身を除く): 30294280

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 37, 40, 47, 68, 74, 85, 94, 136, 148, 170, 185, 188, 235, 289, 296, 340, 370, 376, 470, 578, 629, 680, 740, 799, 940, 1156, 1258, 1445, 1480, 1598, 1739, 1880, 2312, 2516, 2890, 3145, 3196, 3478, 3995, 5032, 5780, 6290, 6392, 6956, 7990, 8695, 10693, 11560, 12580, 13583, 13912, 15980, 17390, 21386, 25160, 27166, 29563, 31960, 34780, 42772, 53465, 54332, 59126, 67915, 69560, 85544, 106930, 108664, 118252, 135830, 147815, 213860, 236504, 271660, 295630, 427720, 502571, 543320, 591260, 1005142, 1182520, 2010284, 2512855, 4020568, 5025710, 10051420, 20102840]

約数ペア:

[(1, 20102840), (2, 10051420), (4, 5025710), (5, 4020568), (8, 2512855), (10, 2010284), (17, 1182520), (20, 1005142), (34, 591260), (37, 543320), (40, 502571), (47, 427720), (68, 295630), (74, 271660), (85, 236504), (94, 213860), (136, 147815), (148, 135830), (170, 118252), (185, 108664), (188, 106930), (235, 85544), (289, 69560), (296, 67915), (340, 59126), (370, 54332), (376, 53465), (470, 42772), (578, 34780), (629, 31960), (680, 29563), (740, 27166), (799, 25160), (940, 21386), (1156, 17390), (1258, 15980), (1445, 13912), (1480, 13583), (1598, 12580), (1739, 11560), (1880, 10693), (2312, 8695), (2516, 7990), (2890, 6956), (3145, 6392), (3196, 6290), (3478, 5780), (3995, 5032)]