21988360

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{83}}^1\times {\mathrm{179}}^1$

素因数の和:310

約数の個数: 64

約数和(自身を含む): 51710400

約数和(自身を除く): 29722040

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 74, 83, 148, 166, 179, 185, 296, 332, 358, 370, 415, 664, 716, 740, 830, 895, 1432, 1480, 1660, 1790, 3071, 3320, 3580, 6142, 6623, 7160, 12284, 13246, 14857, 15355, 24568, 26492, 29714, 30710, 33115, 52984, 59428, 61420, 66230, 74285, 118856, 122840, 132460, 148570, 264920, 297140, 549709, 594280, 1099418, 2198836, 2748545, 4397672, 5497090, 10994180, 21988360]

約数ペア:

[(1, 21988360), (2, 10994180), (4, 5497090), (5, 4397672), (8, 2748545), (10, 2198836), (20, 1099418), (37, 594280), (40, 549709), (74, 297140), (83, 264920), (148, 148570), (166, 132460), (179, 122840), (185, 118856), (296, 74285), (332, 66230), (358, 61420), (370, 59428), (415, 52984), (664, 33115), (716, 30710), (740, 29714), (830, 26492), (895, 24568), (1432, 15355), (1480, 14857), (1660, 13246), (1790, 12284), (3071, 7160), (3320, 6623), (3580, 6142)]