21489375

素因数分解:

$3^1\times 5^4\times {\mathrm{73}}^1\times {\mathrm{157}}^1$

素因数の和:253

約数の個数: 40

約数和(自身を含む): 36525808

約数和(自身を除く): 15036433

約数列:

[1, 3, 5, 15, 25, 73, 75, 125, 157, 219, 365, 375, 471, 625, 785, 1095, 1825, 1875, 2355, 3925, 5475, 9125, 11461, 11775, 19625, 27375, 34383, 45625, 57305, 58875, 98125, 136875, 171915, 286525, 294375, 859575, 1432625, 4297875, 7163125, 21489375]

約数ペア:

[(1, 21489375), (3, 7163125), (5, 4297875), (15, 1432625), (25, 859575), (73, 294375), (75, 286525), (125, 171915), (157, 136875), (219, 98125), (365, 58875), (375, 57305), (471, 45625), (625, 34383), (785, 27375), (1095, 19625), (1825, 11775), (1875, 11461), (2355, 9125), (3925, 5475)]