20643520

素因数分解:

$2^6\times 5^1\times {\mathrm{31}}^1\times {\mathrm{2081}}^1$

素因数の和:2129

約数の個数: 56

約数和(自身を含む): 50767488

約数和(自身を除く): 30123968

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 155, 160, 248, 310, 320, 496, 620, 992, 1240, 1984, 2081, 2480, 4162, 4960, 8324, 9920, 10405, 16648, 20810, 33296, 41620, 64511, 66592, 83240, 129022, 133184, 166480, 258044, 322555, 332960, 516088, 645110, 665920, 1032176, 1290220, 2064352, 2580440, 4128704, 5160880, 10321760, 20643520]

約数ペア:

[(1, 20643520), (2, 10321760), (4, 5160880), (5, 4128704), (8, 2580440), (10, 2064352), (16, 1290220), (20, 1032176), (31, 665920), (32, 645110), (40, 516088), (62, 332960), (64, 322555), (80, 258044), (124, 166480), (155, 133184), (160, 129022), (248, 83240), (310, 66592), (320, 64511), (496, 41620), (620, 33296), (992, 20810), (1240, 16648), (1984, 10405), (2081, 9920), (2480, 8324), (4162, 4960)]