20157225

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{461}}^1$

素因数の和:538

約数の個数: 48

約数和(自身を含む): 37122624

約数和(自身を除く): 16965399

約数列:

[1, 3, 5, 11, 15, 25, 33, 53, 55, 75, 159, 165, 265, 275, 461, 583, 795, 825, 1325, 1383, 1749, 2305, 2915, 3975, 5071, 6915, 8745, 11525, 14575, 15213, 24433, 25355, 34575, 43725, 73299, 76065, 122165, 126775, 268763, 366495, 380325, 610825, 806289, 1343815, 1832475, 4031445, 6719075, 20157225]

約数ペア:

[(1, 20157225), (3, 6719075), (5, 4031445), (11, 1832475), (15, 1343815), (25, 806289), (33, 610825), (53, 380325), (55, 366495), (75, 268763), (159, 126775), (165, 122165), (265, 76065), (275, 73299), (461, 43725), (583, 34575), (795, 25355), (825, 24433), (1325, 15213), (1383, 14575), (1749, 11525), (2305, 8745), (2915, 6915), (3975, 5071)]