81121980

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{73}}^1\times {\mathrm{18521}}^1$

素因数の和:18606

約数の個数: 48

約数和(自身を含む): 230265504

約数和(自身を除く): 149143524

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 73, 146, 219, 292, 365, 438, 730, 876, 1095, 1460, 2190, 4380, 18521, 37042, 55563, 74084, 92605, 111126, 185210, 222252, 277815, 370420, 555630, 1111260, 1352033, 2704066, 4056099, 5408132, 6760165, 8112198, 13520330, 16224396, 20280495, 27040660, 40560990, 81121980]

約数ペア:

[(1, 81121980), (2, 40560990), (3, 27040660), (4, 20280495), (5, 16224396), (6, 13520330), (10, 8112198), (12, 6760165), (15, 5408132), (20, 4056099), (30, 2704066), (60, 1352033), (73, 1111260), (146, 555630), (219, 370420), (292, 277815), (365, 222252), (438, 185210), (730, 111126), (876, 92605), (1095, 74084), (1460, 55563), (2190, 37042), (4380, 18521)]