21215456

素因数分解:

$2^5\times {\mathrm{17}}^1\times {\mathrm{59}}^1\times {\mathrm{661}}^1$

素因数の和:747

約数の個数: 48

約数和(自身を含む): 45042480

約数和(自身を除く): 23827024

約数列:

[1, 2, 4, 8, 16, 17, 32, 34, 59, 68, 118, 136, 236, 272, 472, 544, 661, 944, 1003, 1322, 1888, 2006, 2644, 4012, 5288, 8024, 10576, 11237, 16048, 21152, 22474, 32096, 38999, 44948, 77998, 89896, 155996, 179792, 311992, 359584, 623984, 662983, 1247968, 1325966, 2651932, 5303864, 10607728, 21215456]

約数ペア:

[(1, 21215456), (2, 10607728), (4, 5303864), (8, 2651932), (16, 1325966), (17, 1247968), (32, 662983), (34, 623984), (59, 359584), (68, 311992), (118, 179792), (136, 155996), (236, 89896), (272, 77998), (472, 44948), (544, 38999), (661, 32096), (944, 22474), (1003, 21152), (1322, 16048), (1888, 11237), (2006, 10576), (2644, 8024), (4012, 5288)]