21386456

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{1013}}^1$

素因数の和:1068

約数の個数: 64

約数和(自身を含む): 51105600

約数和(自身を除く): 29719144

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 29, 52, 56, 58, 91, 104, 116, 182, 203, 232, 364, 377, 406, 728, 754, 812, 1013, 1508, 1624, 2026, 2639, 3016, 4052, 5278, 7091, 8104, 10556, 13169, 14182, 21112, 26338, 28364, 29377, 52676, 56728, 58754, 92183, 105352, 117508, 184366, 205639, 235016, 368732, 381901, 411278, 737464, 763802, 822556, 1527604, 1645112, 2673307, 3055208, 5346614, 10693228, 21386456]

約数ペア:

[(1, 21386456), (2, 10693228), (4, 5346614), (7, 3055208), (8, 2673307), (13, 1645112), (14, 1527604), (26, 822556), (28, 763802), (29, 737464), (52, 411278), (56, 381901), (58, 368732), (91, 235016), (104, 205639), (116, 184366), (182, 117508), (203, 105352), (232, 92183), (364, 58754), (377, 56728), (406, 52676), (728, 29377), (754, 28364), (812, 26338), (1013, 21112), (1508, 14182), (1624, 13169), (2026, 10556), (2639, 8104), (3016, 7091), (4052, 5278)]