21369015

素因数分解:

$3^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{2777}}^1$

素因数の和:2813

約数の個数: 40

約数和(自身を含む): 40336560

約数和(自身を除く): 18967545

約数列:

[1, 3, 5, 9, 15, 19, 27, 45, 57, 81, 95, 135, 171, 285, 405, 513, 855, 1539, 2565, 2777, 7695, 8331, 13885, 24993, 41655, 52763, 74979, 124965, 158289, 224937, 263815, 374895, 474867, 791445, 1124685, 1424601, 2374335, 4273803, 7123005, 21369015]

約数ペア:

[(1, 21369015), (3, 7123005), (5, 4273803), (9, 2374335), (15, 1424601), (19, 1124685), (27, 791445), (45, 474867), (57, 374895), (81, 263815), (95, 224937), (135, 158289), (171, 124965), (285, 74979), (405, 52763), (513, 41655), (855, 24993), (1539, 13885), (2565, 8331), (2777, 7695)]