20982325

素因数分解:

$5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{401}}^1$

素因数の和:454

約数の個数: 48

約数和(自身を含む): 33497856

約数和(自身を除く): 12515531

約数列:

[1, 5, 7, 13, 23, 25, 35, 65, 91, 115, 161, 175, 299, 325, 401, 455, 575, 805, 1495, 2005, 2093, 2275, 2807, 4025, 5213, 7475, 9223, 10025, 10465, 14035, 26065, 36491, 46115, 52325, 64561, 70175, 119899, 130325, 182455, 230575, 322805, 599495, 839293, 912275, 1614025, 2997475, 4196465, 20982325]

約数ペア:

[(1, 20982325), (5, 4196465), (7, 2997475), (13, 1614025), (23, 912275), (25, 839293), (35, 599495), (65, 322805), (91, 230575), (115, 182455), (161, 130325), (175, 119899), (299, 70175), (325, 64561), (401, 52325), (455, 46115), (575, 36491), (805, 26065), (1495, 14035), (2005, 10465), (2093, 10025), (2275, 9223), (2807, 7475), (4025, 5213)]