19945280

素因数分解:

$2^6\times 5^1\times {\mathrm{157}}^1\times {\mathrm{397}}^1$

素因数の和:571

約数の個数: 56

約数和(自身を含む): 47917608

約数和(自身を除く): 27972328

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 157, 160, 314, 320, 397, 628, 785, 794, 1256, 1570, 1588, 1985, 2512, 3140, 3176, 3970, 5024, 6280, 6352, 7940, 10048, 12560, 12704, 15880, 25120, 25408, 31760, 50240, 62329, 63520, 124658, 127040, 249316, 311645, 498632, 623290, 997264, 1246580, 1994528, 2493160, 3989056, 4986320, 9972640, 19945280]

約数ペア:

[(1, 19945280), (2, 9972640), (4, 4986320), (5, 3989056), (8, 2493160), (10, 1994528), (16, 1246580), (20, 997264), (32, 623290), (40, 498632), (64, 311645), (80, 249316), (157, 127040), (160, 124658), (314, 63520), (320, 62329), (397, 50240), (628, 31760), (785, 25408), (794, 25120), (1256, 15880), (1570, 12704), (1588, 12560), (1985, 10048), (2512, 7940), (3140, 6352), (3176, 6280), (3970, 5024)]