21951875

素因数分解:

$5^4\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{103}}^1$

素因数の和:165

約数の個数: 40

約数和(自身を含む): 31190016

約数和(自身を除く): 9238141

約数列:

[1, 5, 11, 25, 31, 55, 103, 125, 155, 275, 341, 515, 625, 775, 1133, 1375, 1705, 2575, 3193, 3875, 5665, 6875, 8525, 12875, 15965, 19375, 28325, 35123, 42625, 64375, 79825, 141625, 175615, 213125, 399125, 708125, 878075, 1995625, 4390375, 21951875]

約数ペア:

[(1, 21951875), (5, 4390375), (11, 1995625), (25, 878075), (31, 708125), (55, 399125), (103, 213125), (125, 175615), (155, 141625), (275, 79825), (341, 64375), (515, 42625), (625, 35123), (775, 28325), (1133, 19375), (1375, 15965), (1705, 12875), (2575, 8525), (3193, 6875), (3875, 5665)]