21501975

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{67}}^1\times {\mathrm{389}}^1$

素因数の和:480

約数の個数: 48

約数和(自身を含む): 39461760

約数和(自身を除く): 17959785

約数列:

[1, 3, 5, 11, 15, 25, 33, 55, 67, 75, 165, 201, 275, 335, 389, 737, 825, 1005, 1167, 1675, 1945, 2211, 3685, 4279, 5025, 5835, 9725, 11055, 12837, 18425, 21395, 26063, 29175, 55275, 64185, 78189, 106975, 130315, 286693, 320925, 390945, 651575, 860079, 1433465, 1954725, 4300395, 7167325, 21501975]

約数ペア:

[(1, 21501975), (3, 7167325), (5, 4300395), (11, 1954725), (15, 1433465), (25, 860079), (33, 651575), (55, 390945), (67, 320925), (75, 286693), (165, 130315), (201, 106975), (275, 78189), (335, 64185), (389, 55275), (737, 29175), (825, 26063), (1005, 21395), (1167, 18425), (1675, 12837), (1945, 11055), (2211, 9725), (3685, 5835), (4279, 5025)]