19487720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{881}}^1$

素因数の和:978

約数の個数: 64

約数和(自身を含む): 50803200

約数和(自身を除く): 31315480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 79, 140, 158, 280, 316, 395, 553, 632, 790, 881, 1106, 1580, 1762, 2212, 2765, 3160, 3524, 4405, 4424, 5530, 6167, 7048, 8810, 11060, 12334, 17620, 22120, 24668, 30835, 35240, 49336, 61670, 69599, 123340, 139198, 246680, 278396, 347995, 487193, 556792, 695990, 974386, 1391980, 1948772, 2435965, 2783960, 3897544, 4871930, 9743860, 19487720]

約数ペア:

[(1, 19487720), (2, 9743860), (4, 4871930), (5, 3897544), (7, 2783960), (8, 2435965), (10, 1948772), (14, 1391980), (20, 974386), (28, 695990), (35, 556792), (40, 487193), (56, 347995), (70, 278396), (79, 246680), (140, 139198), (158, 123340), (280, 69599), (316, 61670), (395, 49336), (553, 35240), (632, 30835), (790, 24668), (881, 22120), (1106, 17620), (1580, 12334), (1762, 11060), (2212, 8810), (2765, 7048), (3160, 6167), (3524, 5530), (4405, 4424)]