21585525

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^3\times {\mathrm{131}}^1$

素因数の和:183

約数の個数: 48

約数和(自身を含む): 38955840

約数和(自身を除く): 17370315

約数列:

[1, 3, 5, 13, 15, 25, 39, 65, 75, 131, 169, 195, 325, 393, 507, 655, 845, 975, 1703, 1965, 2197, 2535, 3275, 4225, 5109, 6591, 8515, 9825, 10985, 12675, 22139, 25545, 32955, 42575, 54925, 66417, 110695, 127725, 164775, 287807, 332085, 553475, 863421, 1439035, 1660425, 4317105, 7195175, 21585525]

約数ペア:

[(1, 21585525), (3, 7195175), (5, 4317105), (13, 1660425), (15, 1439035), (25, 863421), (39, 553475), (65, 332085), (75, 287807), (131, 164775), (169, 127725), (195, 110695), (325, 66417), (393, 54925), (507, 42575), (655, 32955), (845, 25545), (975, 22139), (1703, 12675), (1965, 10985), (2197, 9825), (2535, 8515), (3275, 6591), (4225, 5109)]