20869480

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{59}}^1\times {\mathrm{239}}^1$

素因数の和:346

約数の個数: 64

約数和(自身を含む): 49248000

約数和(自身を除く): 28378520

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 59, 74, 118, 148, 185, 236, 239, 295, 296, 370, 472, 478, 590, 740, 956, 1180, 1195, 1480, 1912, 2183, 2360, 2390, 4366, 4780, 8732, 8843, 9560, 10915, 14101, 17464, 17686, 21830, 28202, 35372, 43660, 44215, 56404, 70505, 70744, 87320, 88430, 112808, 141010, 176860, 282020, 353720, 521737, 564040, 1043474, 2086948, 2608685, 4173896, 5217370, 10434740, 20869480]

約数ペア:

[(1, 20869480), (2, 10434740), (4, 5217370), (5, 4173896), (8, 2608685), (10, 2086948), (20, 1043474), (37, 564040), (40, 521737), (59, 353720), (74, 282020), (118, 176860), (148, 141010), (185, 112808), (236, 88430), (239, 87320), (295, 70744), (296, 70505), (370, 56404), (472, 44215), (478, 43660), (590, 35372), (740, 28202), (956, 21830), (1180, 17686), (1195, 17464), (1480, 14101), (1912, 10915), (2183, 9560), (2360, 8843), (2390, 8732), (4366, 4780)]