21636520

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{79}}^1\times {\mathrm{167}}^1$

素因数の和:298

約数の個数: 64

約数和(自身を含む): 50803200

約数和(自身を除く): 29166680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 79, 82, 158, 164, 167, 205, 316, 328, 334, 395, 410, 632, 668, 790, 820, 835, 1336, 1580, 1640, 1670, 3160, 3239, 3340, 6478, 6680, 6847, 12956, 13193, 13694, 16195, 25912, 26386, 27388, 32390, 34235, 52772, 54776, 64780, 65965, 68470, 105544, 129560, 131930, 136940, 263860, 273880, 527720, 540913, 1081826, 2163652, 2704565, 4327304, 5409130, 10818260, 21636520]

約数ペア:

[(1, 21636520), (2, 10818260), (4, 5409130), (5, 4327304), (8, 2704565), (10, 2163652), (20, 1081826), (40, 540913), (41, 527720), (79, 273880), (82, 263860), (158, 136940), (164, 131930), (167, 129560), (205, 105544), (316, 68470), (328, 65965), (334, 64780), (395, 54776), (410, 52772), (632, 34235), (668, 32390), (790, 27388), (820, 26386), (835, 25912), (1336, 16195), (1580, 13694), (1640, 13193), (1670, 12956), (3160, 6847), (3239, 6680), (3340, 6478)]