21323575

素因数分解:

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

素因数の和:153

約数の個数: 54

約数和(自身を含む): 33629544

約数和(自身を除く): 12305969

約数列:

[1, 5, 7, 13, 25, 35, 49, 65, 91, 103, 169, 175, 245, 325, 455, 515, 637, 721, 845, 1183, 1225, 1339, 2275, 2575, 3185, 3605, 4225, 5047, 5915, 6695, 8281, 9373, 15925, 17407, 18025, 25235, 29575, 33475, 41405, 46865, 65611, 87035, 121849, 126175, 207025, 234325, 328055, 435175, 609245, 852943, 1640275, 3046225, 4264715, 21323575]

約数ペア:

[(1, 21323575), (5, 4264715), (7, 3046225), (13, 1640275), (25, 852943), (35, 609245), (49, 435175), (65, 328055), (91, 234325), (103, 207025), (169, 126175), (175, 121849), (245, 87035), (325, 65611), (455, 46865), (515, 41405), (637, 33475), (721, 29575), (845, 25235), (1183, 18025), (1225, 17407), (1339, 15925), (2275, 9373), (2575, 8281), (3185, 6695), (3605, 5915), (4225, 5047)]