19640984

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{691}}^1$

素因数の和:744

約数の個数: 64

約数和(自身を含む): 44841600

約数和(自身を除く): 25200616

約数列:

[1, 2, 4, 8, 11, 17, 19, 22, 34, 38, 44, 68, 76, 88, 136, 152, 187, 209, 323, 374, 418, 646, 691, 748, 836, 1292, 1382, 1496, 1672, 2584, 2764, 3553, 5528, 7106, 7601, 11747, 13129, 14212, 15202, 23494, 26258, 28424, 30404, 46988, 52516, 60808, 93976, 105032, 129217, 144419, 223193, 258434, 288838, 446386, 516868, 577676, 892772, 1033736, 1155352, 1785544, 2455123, 4910246, 9820492, 19640984]

約数ペア:

[(1, 19640984), (2, 9820492), (4, 4910246), (8, 2455123), (11, 1785544), (17, 1155352), (19, 1033736), (22, 892772), (34, 577676), (38, 516868), (44, 446386), (68, 288838), (76, 258434), (88, 223193), (136, 144419), (152, 129217), (187, 105032), (209, 93976), (323, 60808), (374, 52516), (418, 46988), (646, 30404), (691, 28424), (748, 26258), (836, 23494), (1292, 15202), (1382, 14212), (1496, 13129), (1672, 11747), (2584, 7601), (2764, 7106), (3553, 5528)]