20830450

素因数分解:

$2^1\times 5^2\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{151}}^1$

素因数の和:283

約数の個数: 48

約数和(自身を含む): 40711680

約数和(自身を除く): 19881230

約数列:

[1, 2, 5, 10, 25, 31, 50, 62, 89, 151, 155, 178, 302, 310, 445, 755, 775, 890, 1510, 1550, 2225, 2759, 3775, 4450, 4681, 5518, 7550, 9362, 13439, 13795, 23405, 26878, 27590, 46810, 67195, 68975, 117025, 134390, 137950, 234050, 335975, 416609, 671950, 833218, 2083045, 4166090, 10415225, 20830450]

約数ペア:

[(1, 20830450), (2, 10415225), (5, 4166090), (10, 2083045), (25, 833218), (31, 671950), (50, 416609), (62, 335975), (89, 234050), (151, 137950), (155, 134390), (178, 117025), (302, 68975), (310, 67195), (445, 46810), (755, 27590), (775, 26878), (890, 23405), (1510, 13795), (1550, 13439), (2225, 9362), (2759, 7550), (3775, 5518), (4450, 4681)]