21887440

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{6673}}^1$

素因数の和:6727

約数の個数: 40

約数和(自身を含む): 52137288

約数和(自身を除く): 30249848

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 3280, 6673, 13346, 26692, 33365, 53384, 66730, 106768, 133460, 266920, 273593, 533840, 547186, 1094372, 1367965, 2188744, 2735930, 4377488, 5471860, 10943720, 21887440]

約数ペア:

[(1, 21887440), (2, 10943720), (4, 5471860), (5, 4377488), (8, 2735930), (10, 2188744), (16, 1367965), (20, 1094372), (40, 547186), (41, 533840), (80, 273593), (82, 266920), (164, 133460), (205, 106768), (328, 66730), (410, 53384), (656, 33365), (820, 26692), (1640, 13346), (3280, 6673)]