20165925

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^2\times {\mathrm{37}}^1\times {\mathrm{43}}^1$

素因数の和:119

約数の個数: 72

約数和(自身を含む): 37941024

約数和(自身を除く): 17775099

約数列:

[1, 3, 5, 13, 15, 25, 37, 39, 43, 65, 75, 111, 129, 169, 185, 195, 215, 325, 481, 507, 555, 559, 645, 845, 925, 975, 1075, 1443, 1591, 1677, 2405, 2535, 2775, 2795, 3225, 4225, 4773, 6253, 7215, 7267, 7955, 8385, 12025, 12675, 13975, 18759, 20683, 21801, 23865, 31265, 36075, 36335, 39775, 41925, 62049, 93795, 103415, 109005, 119325, 156325, 181675, 268879, 310245, 468975, 517075, 545025, 806637, 1344395, 1551225, 4033185, 6721975, 20165925]

約数ペア:

[(1, 20165925), (3, 6721975), (5, 4033185), (13, 1551225), (15, 1344395), (25, 806637), (37, 545025), (39, 517075), (43, 468975), (65, 310245), (75, 268879), (111, 181675), (129, 156325), (169, 119325), (185, 109005), (195, 103415), (215, 93795), (325, 62049), (481, 41925), (507, 39775), (555, 36335), (559, 36075), (645, 31265), (845, 23865), (925, 21801), (975, 20683), (1075, 18759), (1443, 13975), (1591, 12675), (1677, 12025), (2405, 8385), (2535, 7955), (2775, 7267), (2795, 7215), (3225, 6253), (4225, 4773)]