21216464

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{101}}^1\times {\mathrm{691}}^1$

素因数の和:819

約数の個数: 40

約数和(自身を含む): 43762080

約数和(自身を除く): 22545616

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 101, 152, 202, 304, 404, 691, 808, 1382, 1616, 1919, 2764, 3838, 5528, 7676, 11056, 13129, 15352, 26258, 30704, 52516, 69791, 105032, 139582, 210064, 279164, 558328, 1116656, 1326029, 2652058, 5304116, 10608232, 21216464]

約数ペア:

[(1, 21216464), (2, 10608232), (4, 5304116), (8, 2652058), (16, 1326029), (19, 1116656), (38, 558328), (76, 279164), (101, 210064), (152, 139582), (202, 105032), (304, 69791), (404, 52516), (691, 30704), (808, 26258), (1382, 15352), (1616, 13129), (1919, 11056), (2764, 7676), (3838, 5528)]