30781340

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{71}}^1\times {\mathrm{409}}^1$

素因数の和:542

約数の個数: 48

約数和(自身を含む): 66951360

約数和(自身を除く): 36170020

約数列:

[1, 2, 4, 5, 10, 20, 53, 71, 106, 142, 212, 265, 284, 355, 409, 530, 710, 818, 1060, 1420, 1636, 2045, 3763, 4090, 7526, 8180, 15052, 18815, 21677, 29039, 37630, 43354, 58078, 75260, 86708, 108385, 116156, 145195, 216770, 290390, 433540, 580780, 1539067, 3078134, 6156268, 7695335, 15390670, 30781340]

約数ペア:

[(1, 30781340), (2, 15390670), (4, 7695335), (5, 6156268), (10, 3078134), (20, 1539067), (53, 580780), (71, 433540), (106, 290390), (142, 216770), (212, 145195), (265, 116156), (284, 108385), (355, 86708), (409, 75260), (530, 58078), (710, 43354), (818, 37630), (1060, 29039), (1420, 21677), (1636, 18815), (2045, 15052), (3763, 8180), (4090, 7526)]