20571208

素因数分解:

$2^3\times 7^1\times {\mathrm{29}}^1\times {\mathrm{53}}^1\times {\mathrm{239}}^1$

素因数の和:334

約数の個数: 64

約数和(自身を含む): 46656000

約数和(自身を除く): 26084792

約数列:

[1, 2, 4, 7, 8, 14, 28, 29, 53, 56, 58, 106, 116, 203, 212, 232, 239, 371, 406, 424, 478, 742, 812, 956, 1484, 1537, 1624, 1673, 1912, 2968, 3074, 3346, 6148, 6692, 6931, 10759, 12296, 12667, 13384, 13862, 21518, 25334, 27724, 43036, 48517, 50668, 55448, 86072, 88669, 97034, 101336, 177338, 194068, 354676, 367343, 388136, 709352, 734686, 1469372, 2571401, 2938744, 5142802, 10285604, 20571208]

約数ペア:

[(1, 20571208), (2, 10285604), (4, 5142802), (7, 2938744), (8, 2571401), (14, 1469372), (28, 734686), (29, 709352), (53, 388136), (56, 367343), (58, 354676), (106, 194068), (116, 177338), (203, 101336), (212, 97034), (232, 88669), (239, 86072), (371, 55448), (406, 50668), (424, 48517), (478, 43036), (742, 27724), (812, 25334), (956, 21518), (1484, 13862), (1537, 13384), (1624, 12667), (1673, 12296), (1912, 10759), (2968, 6931), (3074, 6692), (3346, 6148)]