639517238

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{149}}^1\times {\mathrm{179}}^1\times {\mathrm{631}}^1$

素因数の和:980

約数の個数: 32

約数和(自身を含む): 1023840000

約数和(自身を除く): 384322762

約数列:

[1, 2, 19, 38, 149, 179, 298, 358, 631, 1262, 2831, 3401, 5662, 6802, 11989, 23978, 26671, 53342, 94019, 112949, 188038, 225898, 506749, 1013498, 1786361, 2146031, 3572722, 4292062, 16829401, 33658802, 319758619, 639517238]

約数ペア:

[(1, 639517238), (2, 319758619), (19, 33658802), (38, 16829401), (149, 4292062), (179, 3572722), (298, 2146031), (358, 1786361), (631, 1013498), (1262, 506749), (2831, 225898), (3401, 188038), (5662, 112949), (6802, 94019), (11989, 53342), (23978, 26671)]