21132440

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{1063}}^1$

素因数の和:1152

約数の個数: 64

約数和(自身を含む): 55157760

約数和(自身を除く): 34025320

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 71, 140, 142, 280, 284, 355, 497, 568, 710, 994, 1063, 1420, 1988, 2126, 2485, 2840, 3976, 4252, 4970, 5315, 7441, 8504, 9940, 10630, 14882, 19880, 21260, 29764, 37205, 42520, 59528, 74410, 75473, 148820, 150946, 297640, 301892, 377365, 528311, 603784, 754730, 1056622, 1509460, 2113244, 2641555, 3018920, 4226488, 5283110, 10566220, 21132440]

約数ペア:

[(1, 21132440), (2, 10566220), (4, 5283110), (5, 4226488), (7, 3018920), (8, 2641555), (10, 2113244), (14, 1509460), (20, 1056622), (28, 754730), (35, 603784), (40, 528311), (56, 377365), (70, 301892), (71, 297640), (140, 150946), (142, 148820), (280, 75473), (284, 74410), (355, 59528), (497, 42520), (568, 37205), (710, 29764), (994, 21260), (1063, 19880), (1420, 14882), (1988, 10630), (2126, 9940), (2485, 8504), (2840, 7441), (3976, 5315), (4252, 4970)]