638523920

素因数分解:

$2^4\times 5^1\times {\mathrm{251}}^1\times {\mathrm{31799}}^1$

素因数の和:32063

約数の個数: 40

約数和(自身を含む): 1490529600

約数和(自身を除く): 852005680

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 251, 502, 1004, 1255, 2008, 2510, 4016, 5020, 10040, 20080, 31799, 63598, 127196, 158995, 254392, 317990, 508784, 635980, 1271960, 2543920, 7981549, 15963098, 31926196, 39907745, 63852392, 79815490, 127704784, 159630980, 319261960, 638523920]

約数ペア:

[(1, 638523920), (2, 319261960), (4, 159630980), (5, 127704784), (8, 79815490), (10, 63852392), (16, 39907745), (20, 31926196), (40, 15963098), (80, 7981549), (251, 2543920), (502, 1271960), (1004, 635980), (1255, 508784), (2008, 317990), (2510, 254392), (4016, 158995), (5020, 127196), (10040, 63598), (20080, 31799)]