80519900

素因数分解:

$2^2\times 5^2\times {\mathrm{41}}^2\times {\mathrm{479}}^1$

素因数の和:575

約数の個数: 54

約数和(自身を含む): 179467680

約数和(自身を除く): 98947780

約数列:

[1, 2, 4, 5, 10, 20, 25, 41, 50, 82, 100, 164, 205, 410, 479, 820, 958, 1025, 1681, 1916, 2050, 2395, 3362, 4100, 4790, 6724, 8405, 9580, 11975, 16810, 19639, 23950, 33620, 39278, 42025, 47900, 78556, 84050, 98195, 168100, 196390, 392780, 490975, 805199, 981950, 1610398, 1963900, 3220796, 4025995, 8051990, 16103980, 20129975, 40259950, 80519900]

約数ペア:

[(1, 80519900), (2, 40259950), (4, 20129975), (5, 16103980), (10, 8051990), (20, 4025995), (25, 3220796), (41, 1963900), (50, 1610398), (82, 981950), (100, 805199), (164, 490975), (205, 392780), (410, 196390), (479, 168100), (820, 98195), (958, 84050), (1025, 78556), (1681, 47900), (1916, 42025), (2050, 39278), (2395, 33620), (3362, 23950), (4100, 19639), (4790, 16810), (6724, 11975), (8405, 9580)]