21639476

素因数分解:

$2^2\times {\mathrm{53}}^1\times {\mathrm{103}}^1\times {\mathrm{991}}^1$

素因数の和:1151

約数の個数: 24

約数和(自身を含む): 38997504

約数和(自身を除く): 17358028

約数列:

[1, 2, 4, 53, 103, 106, 206, 212, 412, 991, 1982, 3964, 5459, 10918, 21836, 52523, 102073, 105046, 204146, 210092, 408292, 5409869, 10819738, 21639476]

約数ペア:

[(1, 21639476), (2, 10819738), (4, 5409869), (53, 408292), (103, 210092), (106, 204146), (206, 105046), (212, 102073), (412, 52523), (991, 21836), (1982, 10918), (3964, 5459)]