21328336

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{4127}}^1$

素因数の和:4171

約数の個数: 40

約数和(自身を含む): 46068480

約数和(自身を除く): 24740144

約数列:

[1, 2, 4, 8, 16, 17, 19, 34, 38, 68, 76, 136, 152, 272, 304, 323, 646, 1292, 2584, 4127, 5168, 8254, 16508, 33016, 66032, 70159, 78413, 140318, 156826, 280636, 313652, 561272, 627304, 1122544, 1254608, 1333021, 2666042, 5332084, 10664168, 21328336]

約数ペア:

[(1, 21328336), (2, 10664168), (4, 5332084), (8, 2666042), (16, 1333021), (17, 1254608), (19, 1122544), (34, 627304), (38, 561272), (68, 313652), (76, 280636), (136, 156826), (152, 140318), (272, 78413), (304, 70159), (323, 66032), (646, 33016), (1292, 16508), (2584, 8254), (4127, 5168)]