21356860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{1931}}^1$

素因数の和:2026

約数の個数: 48

約数和(自身を含む): 51932160

約数和(自身を除く): 30575300

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 79, 140, 158, 316, 395, 553, 790, 1106, 1580, 1931, 2212, 2765, 3862, 5530, 7724, 9655, 11060, 13517, 19310, 27034, 38620, 54068, 67585, 135170, 152549, 270340, 305098, 610196, 762745, 1067843, 1525490, 2135686, 3050980, 4271372, 5339215, 10678430, 21356860]

約数ペア:

[(1, 21356860), (2, 10678430), (4, 5339215), (5, 4271372), (7, 3050980), (10, 2135686), (14, 1525490), (20, 1067843), (28, 762745), (35, 610196), (70, 305098), (79, 270340), (140, 152549), (158, 135170), (316, 67585), (395, 54068), (553, 38620), (790, 27034), (1106, 19310), (1580, 13517), (1931, 11060), (2212, 9655), (2765, 7724), (3862, 5530)]