21896875

素因数分解:

$5^5\times 7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1$

素因数の和:63

約数の個数: 72

約数和(自身を含む): 37403856

約数和(自身を除く): 15506981

約数列:

[1, 5, 7, 11, 13, 25, 35, 49, 55, 65, 77, 91, 125, 143, 175, 245, 275, 325, 385, 455, 539, 625, 637, 715, 875, 1001, 1225, 1375, 1625, 1925, 2275, 2695, 3125, 3185, 3575, 4375, 5005, 6125, 6875, 7007, 8125, 9625, 11375, 13475, 15925, 17875, 21875, 25025, 30625, 34375, 35035, 40625, 48125, 56875, 67375, 79625, 89375, 125125, 153125, 175175, 240625, 284375, 336875, 398125, 446875, 625625, 875875, 1684375, 1990625, 3128125, 4379375, 21896875]

約数ペア:

[(1, 21896875), (5, 4379375), (7, 3128125), (11, 1990625), (13, 1684375), (25, 875875), (35, 625625), (49, 446875), (55, 398125), (65, 336875), (77, 284375), (91, 240625), (125, 175175), (143, 153125), (175, 125125), (245, 89375), (275, 79625), (325, 67375), (385, 56875), (455, 48125), (539, 40625), (625, 35035), (637, 34375), (715, 30625), (875, 25025), (1001, 21875), (1225, 17875), (1375, 15925), (1625, 13475), (1925, 11375), (2275, 9625), (2695, 8125), (3125, 7007), (3185, 6875), (3575, 6125), (4375, 5005)]