12920425

素因数分解:

$5^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{101}}^1$

素因数の和:178

約数の個数: 48

約数和(自身を含む): 20034432

約数和(自身を除く): 7114007

約数列:

[1, 5, 7, 17, 25, 35, 43, 85, 101, 119, 175, 215, 301, 425, 505, 595, 707, 731, 1075, 1505, 1717, 2525, 2975, 3535, 3655, 4343, 5117, 7525, 8585, 12019, 17675, 18275, 21715, 25585, 30401, 42925, 60095, 73831, 108575, 127925, 152005, 300475, 369155, 516817, 760025, 1845775, 2584085, 12920425]

約数ペア:

[(1, 12920425), (5, 2584085), (7, 1845775), (17, 760025), (25, 516817), (35, 369155), (43, 300475), (85, 152005), (101, 127925), (119, 108575), (175, 73831), (215, 60095), (301, 42925), (425, 30401), (505, 25585), (595, 21715), (707, 18275), (731, 17675), (1075, 12019), (1505, 8585), (1717, 7525), (2525, 5117), (2975, 4343), (3535, 3655)]