20696800

素因数分解:

$2^5\times 5^2\times {\mathrm{41}}^1\times {\mathrm{631}}^1$

素因数の和:692

約数の個数: 72

約数和(自身を含む): 51840432

約数和(自身を除く): 31143632

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 41, 50, 80, 82, 100, 160, 164, 200, 205, 328, 400, 410, 631, 656, 800, 820, 1025, 1262, 1312, 1640, 2050, 2524, 3155, 3280, 4100, 5048, 6310, 6560, 8200, 10096, 12620, 15775, 16400, 20192, 25240, 25871, 31550, 32800, 50480, 51742, 63100, 100960, 103484, 126200, 129355, 206968, 252400, 258710, 413936, 504800, 517420, 646775, 827872, 1034840, 1293550, 2069680, 2587100, 4139360, 5174200, 10348400, 20696800]

約数ペア:

[(1, 20696800), (2, 10348400), (4, 5174200), (5, 4139360), (8, 2587100), (10, 2069680), (16, 1293550), (20, 1034840), (25, 827872), (32, 646775), (40, 517420), (41, 504800), (50, 413936), (80, 258710), (82, 252400), (100, 206968), (160, 129355), (164, 126200), (200, 103484), (205, 100960), (328, 63100), (400, 51742), (410, 50480), (631, 32800), (656, 31550), (800, 25871), (820, 25240), (1025, 20192), (1262, 16400), (1312, 15775), (1640, 12620), (2050, 10096), (2524, 8200), (3155, 6560), (3280, 6310), (4100, 5048)]