21250125

素因数分解:

$3^2\times 5^3\times {\mathrm{13}}^1\times {\mathrm{1453}}^1$

素因数の和:1487

約数の個数: 48

約数和(自身を含む): 41281968

約数和(自身を除く): 20031843

約数列:

[1, 3, 5, 9, 13, 15, 25, 39, 45, 65, 75, 117, 125, 195, 225, 325, 375, 585, 975, 1125, 1453, 1625, 2925, 4359, 4875, 7265, 13077, 14625, 18889, 21795, 36325, 56667, 65385, 94445, 108975, 170001, 181625, 283335, 326925, 472225, 544875, 850005, 1416675, 1634625, 2361125, 4250025, 7083375, 21250125]

約数ペア:

[(1, 21250125), (3, 7083375), (5, 4250025), (9, 2361125), (13, 1634625), (15, 1416675), (25, 850005), (39, 544875), (45, 472225), (65, 326925), (75, 283335), (117, 181625), (125, 170001), (195, 108975), (225, 94445), (325, 65385), (375, 56667), (585, 36325), (975, 21795), (1125, 18889), (1453, 14625), (1625, 13077), (2925, 7265), (4359, 4875)]