21503912

素因数分解:

$2^3\times {\mathrm{17}}^2\times {\mathrm{71}}^1\times {\mathrm{131}}^1$

素因数の和:242

約数の個数: 48

約数和(自身を含む): 43765920

約数和(自身を除く): 22262008

約数列:

[1, 2, 4, 8, 17, 34, 68, 71, 131, 136, 142, 262, 284, 289, 524, 568, 578, 1048, 1156, 1207, 2227, 2312, 2414, 4454, 4828, 8908, 9301, 9656, 17816, 18602, 20519, 37204, 37859, 41038, 74408, 75718, 82076, 151436, 158117, 164152, 302872, 316234, 632468, 1264936, 2687989, 5375978, 10751956, 21503912]

約数ペア:

[(1, 21503912), (2, 10751956), (4, 5375978), (8, 2687989), (17, 1264936), (34, 632468), (68, 316234), (71, 302872), (131, 164152), (136, 158117), (142, 151436), (262, 82076), (284, 75718), (289, 74408), (524, 41038), (568, 37859), (578, 37204), (1048, 20519), (1156, 18602), (1207, 17816), (2227, 9656), (2312, 9301), (2414, 8908), (4454, 4828)]