21289185

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^2\times {\mathrm{1637}}^1$

素因数の和:1682

約数の個数: 36

約数和(自身を含む): 39223548

約数和(自身を除く): 17934363

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 153, 255, 289, 765, 867, 1445, 1637, 2601, 4335, 4911, 8185, 13005, 14733, 24555, 27829, 73665, 83487, 139145, 250461, 417435, 473093, 1252305, 1419279, 2365465, 4257837, 7096395, 21289185]

約数ペア:

[(1, 21289185), (3, 7096395), (5, 4257837), (9, 2365465), (15, 1419279), (17, 1252305), (45, 473093), (51, 417435), (85, 250461), (153, 139145), (255, 83487), (289, 73665), (765, 27829), (867, 24555), (1445, 14733), (1637, 13005), (2601, 8185), (4335, 4911)]