21565456

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{6449}}^1$

素因数の和:6487

約数の個数: 40

約数和(自身を含む): 47988000

約数和(自身を除く): 26422544

約数列:

[1, 2, 4, 8, 11, 16, 19, 22, 38, 44, 76, 88, 152, 176, 209, 304, 418, 836, 1672, 3344, 6449, 12898, 25796, 51592, 70939, 103184, 122531, 141878, 245062, 283756, 490124, 567512, 980248, 1135024, 1347841, 1960496, 2695682, 5391364, 10782728, 21565456]

約数ペア:

[(1, 21565456), (2, 10782728), (4, 5391364), (8, 2695682), (11, 1960496), (16, 1347841), (19, 1135024), (22, 980248), (38, 567512), (44, 490124), (76, 283756), (88, 245062), (152, 141878), (176, 122531), (209, 103184), (304, 70939), (418, 51592), (836, 25796), (1672, 12898), (3344, 6449)]