21206997

素因数分解:

$3^2\times 7^1\times {\mathrm{79}}^1\times {\mathrm{4261}}^1$

素因数の和:4353

約数の個数: 24

約数和(自身を含む): 35459840

約数和(自身を除く): 14252843

約数列:

[1, 3, 7, 9, 21, 63, 79, 237, 553, 711, 1659, 4261, 4977, 12783, 29827, 38349, 89481, 268443, 336619, 1009857, 2356333, 3029571, 7068999, 21206997]

約数ペア:

[(1, 21206997), (3, 7068999), (7, 3029571), (9, 2356333), (21, 1009857), (63, 336619), (79, 268443), (237, 89481), (553, 38349), (711, 29827), (1659, 12783), (4261, 4977)]