21007376

素因数分解:

$2^4\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{457}}^1$

素因数の和:508

約数の個数: 60

約数和(自身を含む): 46768212

約数和(自身を除く): 25760836

約数列:

[1, 2, 4, 8, 13, 16, 17, 26, 34, 52, 68, 104, 136, 169, 208, 221, 272, 338, 442, 457, 676, 884, 914, 1352, 1768, 1828, 2704, 2873, 3536, 3656, 5746, 5941, 7312, 7769, 11492, 11882, 15538, 22984, 23764, 31076, 45968, 47528, 62152, 77233, 95056, 100997, 124304, 154466, 201994, 308932, 403988, 617864, 807976, 1235728, 1312961, 1615952, 2625922, 5251844, 10503688, 21007376]

約数ペア:

[(1, 21007376), (2, 10503688), (4, 5251844), (8, 2625922), (13, 1615952), (16, 1312961), (17, 1235728), (26, 807976), (34, 617864), (52, 403988), (68, 308932), (104, 201994), (136, 154466), (169, 124304), (208, 100997), (221, 95056), (272, 77233), (338, 62152), (442, 47528), (457, 45968), (676, 31076), (884, 23764), (914, 22984), (1352, 15538), (1768, 11882), (1828, 11492), (2704, 7769), (2873, 7312), (3536, 5941), (3656, 5746)]