20863875

素因数分解:

$3^1\times 5^3\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{59}}^1$

素因数の和:141

約数の個数: 64

約数和(自身を含む): 37739520

約数和(自身を除く): 16875645

約数列:

[1, 3, 5, 15, 23, 25, 41, 59, 69, 75, 115, 123, 125, 177, 205, 295, 345, 375, 575, 615, 885, 943, 1025, 1357, 1475, 1725, 2419, 2829, 2875, 3075, 4071, 4425, 4715, 5125, 6785, 7257, 7375, 8625, 12095, 14145, 15375, 20355, 22125, 23575, 33925, 36285, 55637, 60475, 70725, 101775, 117875, 166911, 169625, 181425, 278185, 302375, 353625, 508875, 834555, 907125, 1390925, 4172775, 6954625, 20863875]

約数ペア:

[(1, 20863875), (3, 6954625), (5, 4172775), (15, 1390925), (23, 907125), (25, 834555), (41, 508875), (59, 353625), (69, 302375), (75, 278185), (115, 181425), (123, 169625), (125, 166911), (177, 117875), (205, 101775), (295, 70725), (345, 60475), (375, 55637), (575, 36285), (615, 33925), (885, 23575), (943, 22125), (1025, 20355), (1357, 15375), (1475, 14145), (1725, 12095), (2419, 8625), (2829, 7375), (2875, 7257), (3075, 6785), (4071, 5125), (4425, 4715)]