20921096

素因数分解:

$2^3\times 7^1\times {\mathrm{79}}^1\times {\mathrm{4729}}^1$

素因数の和:4821

約数の個数: 32

約数和(自身を含む): 45408000

約数和(自身を除く): 24486904

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 79, 158, 316, 553, 632, 1106, 2212, 4424, 4729, 9458, 18916, 33103, 37832, 66206, 132412, 264824, 373591, 747182, 1494364, 2615137, 2988728, 5230274, 10460548, 20921096]

約数ペア:

[(1, 20921096), (2, 10460548), (4, 5230274), (7, 2988728), (8, 2615137), (14, 1494364), (28, 747182), (56, 373591), (79, 264824), (158, 132412), (316, 66206), (553, 37832), (632, 33103), (1106, 18916), (2212, 9458), (4424, 4729)]