20981450

素因数分解:

$2^1\times 5^2\times 7^1\times {\mathrm{151}}^1\times {\mathrm{397}}^1$

素因数の和:567

約数の個数: 48

約数和(自身を含む): 45009024

約数和(自身を除く): 24027574

約数列:

[1, 2, 5, 7, 10, 14, 25, 35, 50, 70, 151, 175, 302, 350, 397, 755, 794, 1057, 1510, 1985, 2114, 2779, 3775, 3970, 5285, 5558, 7550, 9925, 10570, 13895, 19850, 26425, 27790, 52850, 59947, 69475, 119894, 138950, 299735, 419629, 599470, 839258, 1498675, 2098145, 2997350, 4196290, 10490725, 20981450]

約数ペア:

[(1, 20981450), (2, 10490725), (5, 4196290), (7, 2997350), (10, 2098145), (14, 1498675), (25, 839258), (35, 599470), (50, 419629), (70, 299735), (151, 138950), (175, 119894), (302, 69475), (350, 59947), (397, 52850), (755, 27790), (794, 26425), (1057, 19850), (1510, 13895), (1985, 10570), (2114, 9925), (2779, 7550), (3775, 5558), (3970, 5285)]