21365625

素因数分解:

$3^1\times 5^5\times {\mathrm{43}}^1\times {\mathrm{53}}^1$

素因数の和:124

約数の個数: 48

約数和(自身を含む): 37122624

約数和(自身を除く): 15756999

約数列:

[1, 3, 5, 15, 25, 43, 53, 75, 125, 129, 159, 215, 265, 375, 625, 645, 795, 1075, 1325, 1875, 2279, 3125, 3225, 3975, 5375, 6625, 6837, 9375, 11395, 16125, 19875, 26875, 33125, 34185, 56975, 80625, 99375, 134375, 165625, 170925, 284875, 403125, 496875, 854625, 1424375, 4273125, 7121875, 21365625]

約数ペア:

[(1, 21365625), (3, 7121875), (5, 4273125), (15, 1424375), (25, 854625), (43, 496875), (53, 403125), (75, 284875), (125, 170925), (129, 165625), (159, 134375), (215, 99375), (265, 80625), (375, 56975), (625, 34185), (645, 33125), (795, 26875), (1075, 19875), (1325, 16125), (1875, 11395), (2279, 9375), (3125, 6837), (3225, 6625), (3975, 5375)]