21406125

素因数分解:

$3^1\times 5^3\times {\mathrm{13}}^1\times {\mathrm{4391}}^1$

素因数の和:4422

約数の個数: 32

約数和(自身を含む): 38368512

約数和(自身を除く): 16962387

約数列:

[1, 3, 5, 13, 15, 25, 39, 65, 75, 125, 195, 325, 375, 975, 1625, 4391, 4875, 13173, 21955, 57083, 65865, 109775, 171249, 285415, 329325, 548875, 856245, 1427075, 1646625, 4281225, 7135375, 21406125]

約数ペア:

[(1, 21406125), (3, 7135375), (5, 4281225), (13, 1646625), (15, 1427075), (25, 856245), (39, 548875), (65, 329325), (75, 285415), (125, 171249), (195, 109775), (325, 65865), (375, 57083), (975, 21955), (1625, 13173), (4391, 4875)]