21070575

素因数分解:

$3^2\times 5^2\times {\mathrm{37}}^1\times {\mathrm{2531}}^1$

素因数の和:2584

約数の個数: 36

約数和(自身を含む): 38775048

約数和(自身を除く): 17704473

約数列:

[1, 3, 5, 9, 15, 25, 37, 45, 75, 111, 185, 225, 333, 555, 925, 1665, 2531, 2775, 7593, 8325, 12655, 22779, 37965, 63275, 93647, 113895, 189825, 280941, 468235, 569475, 842823, 1404705, 2341175, 4214115, 7023525, 21070575]

約数ペア:

[(1, 21070575), (3, 7023525), (5, 4214115), (9, 2341175), (15, 1404705), (25, 842823), (37, 569475), (45, 468235), (75, 280941), (111, 189825), (185, 113895), (225, 93647), (333, 63275), (555, 37965), (925, 22779), (1665, 12655), (2531, 8325), (2775, 7593)]