9991940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{149}}^1\times {\mathrm{479}}^1$

素因数の和:644

約数の個数: 48

約数和(自身を含む): 24192000

約数和(自身を除く): 14200060

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 149, 298, 479, 596, 745, 958, 1043, 1490, 1916, 2086, 2395, 2980, 3353, 4172, 4790, 5215, 6706, 9580, 10430, 13412, 16765, 20860, 33530, 67060, 71371, 142742, 285484, 356855, 499597, 713710, 999194, 1427420, 1998388, 2497985, 4995970, 9991940]

約数ペア:

[(1, 9991940), (2, 4995970), (4, 2497985), (5, 1998388), (7, 1427420), (10, 999194), (14, 713710), (20, 499597), (28, 356855), (35, 285484), (70, 142742), (140, 71371), (149, 67060), (298, 33530), (479, 20860), (596, 16765), (745, 13412), (958, 10430), (1043, 9580), (1490, 6706), (1916, 5215), (2086, 4790), (2395, 4172), (2980, 3353)]