20325987

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{179}}^1$

素因数の和:264

約数の個数: 48

約数和(自身を含む): 34145280

約数和(自身を除く): 13819293

約数列:

[1, 3, 9, 11, 31, 33, 37, 93, 99, 111, 179, 279, 333, 341, 407, 537, 1023, 1147, 1221, 1611, 1969, 3069, 3441, 3663, 5549, 5907, 6623, 10323, 12617, 16647, 17721, 19869, 37851, 49941, 59607, 61039, 72853, 113553, 183117, 205313, 218559, 549351, 615939, 655677, 1847817, 2258443, 6775329, 20325987]

約数ペア:

[(1, 20325987), (3, 6775329), (9, 2258443), (11, 1847817), (31, 655677), (33, 615939), (37, 549351), (93, 218559), (99, 205313), (111, 183117), (179, 113553), (279, 72853), (333, 61039), (341, 59607), (407, 49941), (537, 37851), (1023, 19869), (1147, 17721), (1221, 16647), (1611, 12617), (1969, 10323), (3069, 6623), (3441, 5907), (3663, 5549)]