20217645

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{53}}^1\times {\mathrm{173}}^1$

素因数の和:251

約数の個数: 72

約数和(自身を含む): 41774616

約数和(自身を除く): 21556971

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 49, 53, 63, 105, 147, 159, 173, 245, 265, 315, 371, 441, 477, 519, 735, 795, 865, 1113, 1211, 1557, 1855, 2205, 2385, 2595, 2597, 3339, 3633, 5565, 6055, 7785, 7791, 8477, 9169, 10899, 12985, 16695, 18165, 23373, 25431, 27507, 38955, 42385, 45845, 54495, 64183, 76293, 82521, 116865, 127155, 137535, 192549, 320915, 381465, 412605, 449281, 577647, 962745, 1347843, 2246405, 2888235, 4043529, 6739215, 20217645]

約数ペア:

[(1, 20217645), (3, 6739215), (5, 4043529), (7, 2888235), (9, 2246405), (15, 1347843), (21, 962745), (35, 577647), (45, 449281), (49, 412605), (53, 381465), (63, 320915), (105, 192549), (147, 137535), (159, 127155), (173, 116865), (245, 82521), (265, 76293), (315, 64183), (371, 54495), (441, 45845), (477, 42385), (519, 38955), (735, 27507), (795, 25431), (865, 23373), (1113, 18165), (1211, 16695), (1557, 12985), (1855, 10899), (2205, 9169), (2385, 8477), (2595, 7791), (2597, 7785), (3339, 6055), (3633, 5565)]