21920072

素因数分解:

$2^3\times {\mathrm{17}}^2\times {\mathrm{19}}^1\times {\mathrm{499}}^1$

素因数の和:558

約数の個数: 48

約数和(自身を含む): 46050000

約数和(自身を除く): 24129928

約数列:

[1, 2, 4, 8, 17, 19, 34, 38, 68, 76, 136, 152, 289, 323, 499, 578, 646, 998, 1156, 1292, 1996, 2312, 2584, 3992, 5491, 8483, 9481, 10982, 16966, 18962, 21964, 33932, 37924, 43928, 67864, 75848, 144211, 161177, 288422, 322354, 576844, 644708, 1153688, 1289416, 2740009, 5480018, 10960036, 21920072]

約数ペア:

[(1, 21920072), (2, 10960036), (4, 5480018), (8, 2740009), (17, 1289416), (19, 1153688), (34, 644708), (38, 576844), (68, 322354), (76, 288422), (136, 161177), (152, 144211), (289, 75848), (323, 67864), (499, 43928), (578, 37924), (646, 33932), (998, 21964), (1156, 18962), (1292, 16966), (1996, 10982), (2312, 9481), (2584, 8483), (3992, 5491)]