21097515

素因数分解:

$3^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{59}}^1\times {\mathrm{769}}^1$

素因数の和:867

約数の個数: 32

約数和(自身を含む): 35481600

約数和(自身を除く): 14384085

約数列:

[1, 3, 5, 15, 31, 59, 93, 155, 177, 295, 465, 769, 885, 1829, 2307, 3845, 5487, 9145, 11535, 23839, 27435, 45371, 71517, 119195, 136113, 226855, 357585, 680565, 1406501, 4219503, 7032505, 21097515]

約数ペア:

[(1, 21097515), (3, 7032505), (5, 4219503), (15, 1406501), (31, 680565), (59, 357585), (93, 226855), (155, 136113), (177, 119195), (295, 71517), (465, 45371), (769, 27435), (885, 23839), (1829, 11535), (2307, 9145), (3845, 5487)]