397839820

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{405959}}^1$

素因数の和:405982

約数の個数: 36

約数和(自身を含む): 971868240

約数和(自身を除く): 574028420

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 405959, 811918, 1623836, 2029795, 2841713, 4059590, 5683426, 8119180, 11366852, 14208565, 19891991, 28417130, 39783982, 56834260, 79567964, 99459955, 198919910, 397839820]

約数ペア:

[(1, 397839820), (2, 198919910), (4, 99459955), (5, 79567964), (7, 56834260), (10, 39783982), (14, 28417130), (20, 19891991), (28, 14208565), (35, 11366852), (49, 8119180), (70, 5683426), (98, 4059590), (140, 2841713), (196, 2029795), (245, 1623836), (490, 811918), (980, 405959)]