21360778820

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{571}}^1\times {\mathrm{64499}}^1$

素因数の和:65108

約数の個数: 48

約数和(自身を含む): 46486440000

約数和(自身を除く): 25125661180

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 116, 145, 290, 571, 580, 1142, 2284, 2855, 5710, 11420, 16559, 33118, 64499, 66236, 82795, 128998, 165590, 257996, 322495, 331180, 644990, 1289980, 1870471, 3740942, 7481884, 9352355, 18704710, 36828929, 37409420, 73657858, 147315716, 184144645, 368289290, 736578580, 1068038941, 2136077882, 4272155764, 5340194705, 10680389410, 21360778820]

約数ペア:

[(1, 21360778820), (2, 10680389410), (4, 5340194705), (5, 4272155764), (10, 2136077882), (20, 1068038941), (29, 736578580), (58, 368289290), (116, 184144645), (145, 147315716), (290, 73657858), (571, 37409420), (580, 36828929), (1142, 18704710), (2284, 9352355), (2855, 7481884), (5710, 3740942), (11420, 1870471), (16559, 1289980), (33118, 644990), (64499, 331180), (66236, 322495), (82795, 257996), (128998, 165590)]