21801759

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{101}}^1\times {\mathrm{541}}^1$

素因数の和:671

約数の個数: 32

約数和(自身を含む): 35381760

約数和(自身を除く): 13580001

約数列:

[1, 3, 7, 19, 21, 57, 101, 133, 303, 399, 541, 707, 1623, 1919, 2121, 3787, 5757, 10279, 11361, 13433, 30837, 40299, 54641, 71953, 163923, 215859, 382487, 1038179, 1147461, 3114537, 7267253, 21801759]

約数ペア:

[(1, 21801759), (3, 7267253), (7, 3114537), (19, 1147461), (21, 1038179), (57, 382487), (101, 215859), (133, 163923), (303, 71953), (399, 54641), (541, 40299), (707, 30837), (1623, 13433), (1919, 11361), (2121, 10279), (3787, 5757)]