12978990

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{17}}^2\times {\mathrm{499}}^1$

素因数の和:546

約数の個数: 72

約数和(自身を含む): 35919000

約数和(自身を除く): 22940010

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 17, 18, 30, 34, 45, 51, 85, 90, 102, 153, 170, 255, 289, 306, 499, 510, 578, 765, 867, 998, 1445, 1497, 1530, 1734, 2495, 2601, 2890, 2994, 4335, 4491, 4990, 5202, 7485, 8483, 8670, 8982, 13005, 14970, 16966, 22455, 25449, 26010, 42415, 44910, 50898, 76347, 84830, 127245, 144211, 152694, 254490, 288422, 381735, 432633, 721055, 763470, 865266, 1297899, 1442110, 2163165, 2595798, 4326330, 6489495, 12978990]

約数ペア:

[(1, 12978990), (2, 6489495), (3, 4326330), (5, 2595798), (6, 2163165), (9, 1442110), (10, 1297899), (15, 865266), (17, 763470), (18, 721055), (30, 432633), (34, 381735), (45, 288422), (51, 254490), (85, 152694), (90, 144211), (102, 127245), (153, 84830), (170, 76347), (255, 50898), (289, 44910), (306, 42415), (499, 26010), (510, 25449), (578, 22455), (765, 16966), (867, 14970), (998, 13005), (1445, 8982), (1497, 8670), (1530, 8483), (1734, 7485), (2495, 5202), (2601, 4990), (2890, 4491), (2994, 4335)]