21385970

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{149}}^1\times {\mathrm{463}}^1$

素因数の和:650

約数の個数: 32

約数和(自身を含む): 40089600

約数和(自身を除く): 18703630

約数列:

[1, 2, 5, 10, 31, 62, 149, 155, 298, 310, 463, 745, 926, 1490, 2315, 4619, 4630, 9238, 14353, 23095, 28706, 46190, 68987, 71765, 137974, 143530, 344935, 689870, 2138597, 4277194, 10692985, 21385970]

約数ペア:

[(1, 21385970), (2, 10692985), (5, 4277194), (10, 2138597), (31, 689870), (62, 344935), (149, 143530), (155, 137974), (298, 71765), (310, 68987), (463, 46190), (745, 28706), (926, 23095), (1490, 14353), (2315, 9238), (4619, 4630)]