19494040

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{199}}^1$

素因数の和:320

約数の個数: 64

約数和(自身を含む): 46080000

約数和(自身を除く): 26585960

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 79, 124, 155, 158, 199, 248, 310, 316, 395, 398, 620, 632, 790, 796, 995, 1240, 1580, 1592, 1990, 2449, 3160, 3980, 4898, 6169, 7960, 9796, 12245, 12338, 15721, 19592, 24490, 24676, 30845, 31442, 48980, 49352, 61690, 62884, 78605, 97960, 123380, 125768, 157210, 246760, 314420, 487351, 628840, 974702, 1949404, 2436755, 3898808, 4873510, 9747020, 19494040]

約数ペア:

[(1, 19494040), (2, 9747020), (4, 4873510), (5, 3898808), (8, 2436755), (10, 1949404), (20, 974702), (31, 628840), (40, 487351), (62, 314420), (79, 246760), (124, 157210), (155, 125768), (158, 123380), (199, 97960), (248, 78605), (310, 62884), (316, 61690), (395, 49352), (398, 48980), (620, 31442), (632, 30845), (790, 24676), (796, 24490), (995, 19592), (1240, 15721), (1580, 12338), (1592, 12245), (1990, 9796), (2449, 7960), (3160, 6169), (3980, 4898)]