21590625

素因数分解:

$3^1\times 5^5\times 7^2\times {\mathrm{47}}^1$

素因数の和:89

約数の個数: 72

約数和(自身を含む): 42747264

約数和(自身を除く): 21156639

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 47, 49, 75, 105, 125, 141, 147, 175, 235, 245, 329, 375, 525, 625, 705, 735, 875, 987, 1175, 1225, 1645, 1875, 2303, 2625, 3125, 3525, 3675, 4375, 4935, 5875, 6125, 6909, 8225, 9375, 11515, 13125, 17625, 18375, 21875, 24675, 29375, 30625, 34545, 41125, 57575, 65625, 88125, 91875, 123375, 146875, 153125, 172725, 205625, 287875, 440625, 459375, 616875, 863625, 1028125, 1439375, 3084375, 4318125, 7196875, 21590625]

約数ペア:

[(1, 21590625), (3, 7196875), (5, 4318125), (7, 3084375), (15, 1439375), (21, 1028125), (25, 863625), (35, 616875), (47, 459375), (49, 440625), (75, 287875), (105, 205625), (125, 172725), (141, 153125), (147, 146875), (175, 123375), (235, 91875), (245, 88125), (329, 65625), (375, 57575), (525, 41125), (625, 34545), (705, 30625), (735, 29375), (875, 24675), (987, 21875), (1175, 18375), (1225, 17625), (1645, 13125), (1875, 11515), (2303, 9375), (2625, 8225), (3125, 6909), (3525, 6125), (3675, 5875), (4375, 4935)]