20328140

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{20743}}^1$

素因数の和:20766

約数の個数: 36

約数和(自身を含む): 49661136

約数和(自身を除く): 29332996

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 20743, 41486, 82972, 103715, 145201, 207430, 290402, 414860, 580804, 726005, 1016407, 1452010, 2032814, 2904020, 4065628, 5082035, 10164070, 20328140]

約数ペア:

[(1, 20328140), (2, 10164070), (4, 5082035), (5, 4065628), (7, 2904020), (10, 2032814), (14, 1452010), (20, 1016407), (28, 726005), (35, 580804), (49, 414860), (70, 290402), (98, 207430), (140, 145201), (196, 103715), (245, 82972), (490, 41486), (980, 20743)]