18711875

素因数分解:

$5^4\times 7^2\times {\mathrm{13}}^1\times {\mathrm{47}}^1$

素因数の和:94

約数の個数: 60

約数和(自身を含む): 29915424

約数和(自身を除く): 11203549

約数列:

[1, 5, 7, 13, 25, 35, 47, 49, 65, 91, 125, 175, 235, 245, 325, 329, 455, 611, 625, 637, 875, 1175, 1225, 1625, 1645, 2275, 2303, 3055, 3185, 4277, 4375, 5875, 6125, 8125, 8225, 11375, 11515, 15275, 15925, 21385, 29375, 29939, 30625, 41125, 56875, 57575, 76375, 79625, 106925, 149695, 205625, 287875, 381875, 398125, 534625, 748475, 1439375, 2673125, 3742375, 18711875]

約数ペア:

[(1, 18711875), (5, 3742375), (7, 2673125), (13, 1439375), (25, 748475), (35, 534625), (47, 398125), (49, 381875), (65, 287875), (91, 205625), (125, 149695), (175, 106925), (235, 79625), (245, 76375), (325, 57575), (329, 56875), (455, 41125), (611, 30625), (625, 29939), (637, 29375), (875, 21385), (1175, 15925), (1225, 15275), (1625, 11515), (1645, 11375), (2275, 8225), (2303, 8125), (3055, 6125), (3185, 5875), (4277, 4375)]