21784120

素因数分解:

$2^3\times 5^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{359}}^1$

素因数の和:448

約数の個数: 64

約数和(自身を含む): 51710400

約数和(自身を除く): 29926280

約数列:

[1, 2, 4, 5, 8, 10, 20, 37, 40, 41, 74, 82, 148, 164, 185, 205, 296, 328, 359, 370, 410, 718, 740, 820, 1436, 1480, 1517, 1640, 1795, 2872, 3034, 3590, 6068, 7180, 7585, 12136, 13283, 14360, 14719, 15170, 26566, 29438, 30340, 53132, 58876, 60680, 66415, 73595, 106264, 117752, 132830, 147190, 265660, 294380, 531320, 544603, 588760, 1089206, 2178412, 2723015, 4356824, 5446030, 10892060, 21784120]

約数ペア:

[(1, 21784120), (2, 10892060), (4, 5446030), (5, 4356824), (8, 2723015), (10, 2178412), (20, 1089206), (37, 588760), (40, 544603), (41, 531320), (74, 294380), (82, 265660), (148, 147190), (164, 132830), (185, 117752), (205, 106264), (296, 73595), (328, 66415), (359, 60680), (370, 58876), (410, 53132), (718, 30340), (740, 29438), (820, 26566), (1436, 15170), (1480, 14719), (1517, 14360), (1640, 13283), (1795, 12136), (2872, 7585), (3034, 7180), (3590, 6068)]