21720280

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{23609}}^1$

素因数の和:23643

約数の個数: 32

約数和(自身を含む): 50997600

約数和(自身を除く): 29277320

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 92, 115, 184, 230, 460, 920, 23609, 47218, 94436, 118045, 188872, 236090, 472180, 543007, 944360, 1086014, 2172028, 2715035, 4344056, 5430070, 10860140, 21720280]

約数ペア:

[(1, 21720280), (2, 10860140), (4, 5430070), (5, 4344056), (8, 2715035), (10, 2172028), (20, 1086014), (23, 944360), (40, 543007), (46, 472180), (92, 236090), (115, 188872), (184, 118045), (230, 94436), (460, 47218), (920, 23609)]