20218575

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{233}}^1$

素因数の和:348

約数の個数: 48

約数和(自身を含む): 36560160

約数和(自身を除く): 16341585

約数列:

[1, 3, 5, 13, 15, 25, 39, 65, 75, 89, 195, 233, 267, 325, 445, 699, 975, 1157, 1165, 1335, 2225, 3029, 3471, 3495, 5785, 5825, 6675, 9087, 15145, 17355, 17475, 20737, 28925, 45435, 62211, 75725, 86775, 103685, 227175, 269581, 311055, 518425, 808743, 1347905, 1555275, 4043715, 6739525, 20218575]

約数ペア:

[(1, 20218575), (3, 6739525), (5, 4043715), (13, 1555275), (15, 1347905), (25, 808743), (39, 518425), (65, 311055), (75, 269581), (89, 227175), (195, 103685), (233, 86775), (267, 75725), (325, 62211), (445, 45435), (699, 28925), (975, 20737), (1157, 17475), (1165, 17355), (1335, 15145), (2225, 9087), (3029, 6675), (3471, 5825), (3495, 5785)]