21307240

素因数分解:

$2^3\times 5^1\times {\mathrm{73}}^1\times {\mathrm{7297}}^1$

素因数の和:7381

約数の個数: 32

約数和(自身を含む): 48604680

約数和(自身を除く): 27297440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 73, 146, 292, 365, 584, 730, 1460, 2920, 7297, 14594, 29188, 36485, 58376, 72970, 145940, 291880, 532681, 1065362, 2130724, 2663405, 4261448, 5326810, 10653620, 21307240]

約数ペア:

[(1, 21307240), (2, 10653620), (4, 5326810), (5, 4261448), (8, 2663405), (10, 2130724), (20, 1065362), (40, 532681), (73, 291880), (146, 145940), (292, 72970), (365, 58376), (584, 36485), (730, 29188), (1460, 14594), (2920, 7297)]