21313275

素因数分解:

$3^1\times 5^2\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{103}}^1$

素因数の和:236

約数の個数: 48

約数和(自身を含む): 37140480

約数和(自身を除く): 15827205

約数列:

[1, 3, 5, 15, 25, 31, 75, 89, 93, 103, 155, 267, 309, 445, 465, 515, 775, 1335, 1545, 2225, 2325, 2575, 2759, 3193, 6675, 7725, 8277, 9167, 9579, 13795, 15965, 27501, 41385, 45835, 47895, 68975, 79825, 137505, 206925, 229175, 239475, 284177, 687525, 852531, 1420885, 4262655, 7104425, 21313275]

約数ペア:

[(1, 21313275), (3, 7104425), (5, 4262655), (15, 1420885), (25, 852531), (31, 687525), (75, 284177), (89, 239475), (93, 229175), (103, 206925), (155, 137505), (267, 79825), (309, 68975), (445, 47895), (465, 45835), (515, 41385), (775, 27501), (1335, 15965), (1545, 13795), (2225, 9579), (2325, 9167), (2575, 8277), (2759, 7725), (3193, 6675)]