21207700

素因数分解:

$2^2\times 5^2\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{103}}^1$

素因数の和:217

約数の個数: 72

約数和(自身を含む): 48746880

約数和(自身を除く): 27539180

約数列:

[1, 2, 4, 5, 10, 20, 25, 29, 50, 58, 71, 100, 103, 116, 142, 145, 206, 284, 290, 355, 412, 515, 580, 710, 725, 1030, 1420, 1450, 1775, 2059, 2060, 2575, 2900, 2987, 3550, 4118, 5150, 5974, 7100, 7313, 8236, 10295, 10300, 11948, 14626, 14935, 20590, 29252, 29870, 36565, 41180, 51475, 59740, 73130, 74675, 102950, 146260, 149350, 182825, 205900, 212077, 298700, 365650, 424154, 731300, 848308, 1060385, 2120770, 4241540, 5301925, 10603850, 21207700]

約数ペア:

[(1, 21207700), (2, 10603850), (4, 5301925), (5, 4241540), (10, 2120770), (20, 1060385), (25, 848308), (29, 731300), (50, 424154), (58, 365650), (71, 298700), (100, 212077), (103, 205900), (116, 182825), (142, 149350), (145, 146260), (206, 102950), (284, 74675), (290, 73130), (355, 59740), (412, 51475), (515, 41180), (580, 36565), (710, 29870), (725, 29252), (1030, 20590), (1420, 14935), (1450, 14626), (1775, 11948), (2059, 10300), (2060, 10295), (2575, 8236), (2900, 7313), (2987, 7100), (3550, 5974), (4118, 5150)]