13015940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{239}}^1\times {\mathrm{389}}^1$

素因数の和:644

約数の個数: 48

約数和(自身を含む): 31449600

約数和(自身を除く): 18433660

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 239, 389, 478, 778, 956, 1195, 1556, 1673, 1945, 2390, 2723, 3346, 3890, 4780, 5446, 6692, 7780, 8365, 10892, 13615, 16730, 27230, 33460, 54460, 92971, 185942, 371884, 464855, 650797, 929710, 1301594, 1859420, 2603188, 3253985, 6507970, 13015940]

約数ペア:

[(1, 13015940), (2, 6507970), (4, 3253985), (5, 2603188), (7, 1859420), (10, 1301594), (14, 929710), (20, 650797), (28, 464855), (35, 371884), (70, 185942), (140, 92971), (239, 54460), (389, 33460), (478, 27230), (778, 16730), (956, 13615), (1195, 10892), (1556, 8365), (1673, 7780), (1945, 6692), (2390, 5446), (2723, 4780), (3346, 3890)]