21026920

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{379}}^1$

素因数の和:482

約数の個数: 64

約数和(自身を含む): 50616000

約数和(自身を除く): 29589080

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 73, 76, 95, 146, 152, 190, 292, 365, 379, 380, 584, 730, 758, 760, 1387, 1460, 1516, 1895, 2774, 2920, 3032, 3790, 5548, 6935, 7201, 7580, 11096, 13870, 14402, 15160, 27667, 27740, 28804, 36005, 55334, 55480, 57608, 72010, 110668, 138335, 144020, 221336, 276670, 288040, 525673, 553340, 1051346, 1106680, 2102692, 2628365, 4205384, 5256730, 10513460, 21026920]

約数ペア:

[(1, 21026920), (2, 10513460), (4, 5256730), (5, 4205384), (8, 2628365), (10, 2102692), (19, 1106680), (20, 1051346), (38, 553340), (40, 525673), (73, 288040), (76, 276670), (95, 221336), (146, 144020), (152, 138335), (190, 110668), (292, 72010), (365, 57608), (379, 55480), (380, 55334), (584, 36005), (730, 28804), (758, 27740), (760, 27667), (1387, 15160), (1460, 14402), (1516, 13870), (1895, 11096), (2774, 7580), (2920, 7201), (3032, 6935), (3790, 5548)]