638768

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{83}}^1$

素因数の和:141

約数の個数: 40

約数和(自身を含む): 1385328

約数和(自身を除く): 746560

約数列:

[1, 2, 4, 8, 13, 16, 26, 37, 52, 74, 83, 104, 148, 166, 208, 296, 332, 481, 592, 664, 962, 1079, 1328, 1924, 2158, 3071, 3848, 4316, 6142, 7696, 8632, 12284, 17264, 24568, 39923, 49136, 79846, 159692, 319384, 638768]

約数ペア:

[(1, 638768), (2, 319384), (4, 159692), (8, 79846), (13, 49136), (16, 39923), (26, 24568), (37, 17264), (52, 12284), (74, 8632), (83, 7696), (104, 6142), (148, 4316), (166, 3848), (208, 3071), (296, 2158), (332, 1924), (481, 1328), (592, 1079), (664, 962)]