31165225

素因数分解:

$5^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{103}}^1$

素因数の和:159

約数の個数: 72

約数和(自身を含む): 51455040

約数和(自身を除く): 20289815

約数列:

[1, 5, 7, 13, 19, 25, 35, 49, 65, 91, 95, 103, 133, 175, 245, 247, 325, 455, 475, 515, 637, 665, 721, 931, 1225, 1235, 1339, 1729, 1957, 2275, 2575, 3185, 3325, 3605, 4655, 5047, 6175, 6695, 8645, 9373, 9785, 12103, 13699, 15925, 18025, 23275, 25235, 25441, 33475, 43225, 46865, 48925, 60515, 65611, 68495, 95893, 126175, 127205, 178087, 234325, 302575, 328055, 342475, 479465, 636025, 890435, 1246609, 1640275, 2397325, 4452175, 6233045, 31165225]

約数ペア:

[(1, 31165225), (5, 6233045), (7, 4452175), (13, 2397325), (19, 1640275), (25, 1246609), (35, 890435), (49, 636025), (65, 479465), (91, 342475), (95, 328055), (103, 302575), (133, 234325), (175, 178087), (245, 127205), (247, 126175), (325, 95893), (455, 68495), (475, 65611), (515, 60515), (637, 48925), (665, 46865), (721, 43225), (931, 33475), (1225, 25441), (1235, 25235), (1339, 23275), (1729, 18025), (1957, 15925), (2275, 13699), (2575, 12103), (3185, 9785), (3325, 9373), (3605, 8645), (4655, 6695), (5047, 6175)]