21715160

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{10243}}^1$

素因数の和:10307

約数の個数: 32

約数和(自身を含む): 49785840

約数和(自身を除く): 28070680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 106, 212, 265, 424, 530, 1060, 2120, 10243, 20486, 40972, 51215, 81944, 102430, 204860, 409720, 542879, 1085758, 2171516, 2714395, 4343032, 5428790, 10857580, 21715160]

約数ペア:

[(1, 21715160), (2, 10857580), (4, 5428790), (5, 4343032), (8, 2714395), (10, 2171516), (20, 1085758), (40, 542879), (53, 409720), (106, 204860), (212, 102430), (265, 81944), (424, 51215), (530, 40972), (1060, 20486), (2120, 10243)]