21978250

素因数分解:

$2^1\times 5^3\times 7^1\times {\mathrm{19}}^1\times {\mathrm{661}}^1$

素因数の和:704

約数の個数: 64

約数和(自身を含む): 49570560

約数和(自身を除く): 27592310

約数列:

[1, 2, 5, 7, 10, 14, 19, 25, 35, 38, 50, 70, 95, 125, 133, 175, 190, 250, 266, 350, 475, 661, 665, 875, 950, 1322, 1330, 1750, 2375, 3305, 3325, 4627, 4750, 6610, 6650, 9254, 12559, 16525, 16625, 23135, 25118, 33050, 33250, 46270, 62795, 82625, 87913, 115675, 125590, 165250, 175826, 231350, 313975, 439565, 578375, 627950, 879130, 1156750, 1569875, 2197825, 3139750, 4395650, 10989125, 21978250]

約数ペア:

[(1, 21978250), (2, 10989125), (5, 4395650), (7, 3139750), (10, 2197825), (14, 1569875), (19, 1156750), (25, 879130), (35, 627950), (38, 578375), (50, 439565), (70, 313975), (95, 231350), (125, 175826), (133, 165250), (175, 125590), (190, 115675), (250, 87913), (266, 82625), (350, 62795), (475, 46270), (661, 33250), (665, 33050), (875, 25118), (950, 23135), (1322, 16625), (1330, 16525), (1750, 12559), (2375, 9254), (3305, 6650), (3325, 6610), (4627, 4750)]