21821380

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{1973}}^1$

素因数の和:2068

約数の個数: 48

約数和(自身を含む): 53061120

約数和(自身を除く): 31239740

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 79, 140, 158, 316, 395, 553, 790, 1106, 1580, 1973, 2212, 2765, 3946, 5530, 7892, 9865, 11060, 13811, 19730, 27622, 39460, 55244, 69055, 138110, 155867, 276220, 311734, 623468, 779335, 1091069, 1558670, 2182138, 3117340, 4364276, 5455345, 10910690, 21821380]

約数ペア:

[(1, 21821380), (2, 10910690), (4, 5455345), (5, 4364276), (7, 3117340), (10, 2182138), (14, 1558670), (20, 1091069), (28, 779335), (35, 623468), (70, 311734), (79, 276220), (140, 155867), (158, 138110), (316, 69055), (395, 55244), (553, 39460), (790, 27622), (1106, 19730), (1580, 13811), (1973, 11060), (2212, 9865), (2765, 7892), (3946, 5530)]