128437820

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{131059}}^1$

素因数の和:131082

約数の個数: 36

約数和(自身を含む): 313757640

約数和(自身を除く): 185319820

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 131059, 262118, 524236, 655295, 917413, 1310590, 1834826, 2621180, 3669652, 4587065, 6421891, 9174130, 12843782, 18348260, 25687564, 32109455, 64218910, 128437820]

約数ペア:

[(1, 128437820), (2, 64218910), (4, 32109455), (5, 25687564), (7, 18348260), (10, 12843782), (14, 9174130), (20, 6421891), (28, 4587065), (35, 3669652), (49, 2621180), (70, 1834826), (98, 1310590), (140, 917413), (196, 655295), (245, 524236), (490, 262118), (980, 131059)]