20020280

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{563}}^1$

素因数の和:708

約数の個数: 64

約数和(自身を含む): 51978240

約数和(自身を除く): 31957960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 127, 140, 254, 280, 508, 563, 635, 889, 1016, 1126, 1270, 1778, 2252, 2540, 2815, 3556, 3941, 4445, 4504, 5080, 5630, 7112, 7882, 8890, 11260, 15764, 17780, 19705, 22520, 31528, 35560, 39410, 71501, 78820, 143002, 157640, 286004, 357505, 500507, 572008, 715010, 1001014, 1430020, 2002028, 2502535, 2860040, 4004056, 5005070, 10010140, 20020280]

約数ペア:

[(1, 20020280), (2, 10010140), (4, 5005070), (5, 4004056), (7, 2860040), (8, 2502535), (10, 2002028), (14, 1430020), (20, 1001014), (28, 715010), (35, 572008), (40, 500507), (56, 357505), (70, 286004), (127, 157640), (140, 143002), (254, 78820), (280, 71501), (508, 39410), (563, 35560), (635, 31528), (889, 22520), (1016, 19705), (1126, 17780), (1270, 15764), (1778, 11260), (2252, 8890), (2540, 7882), (2815, 7112), (3556, 5630), (3941, 5080), (4445, 4504)]