81429880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{290821}}^1$

素因数の和:290839

約数の個数: 32

約数和(自身を含む): 209391840

約数和(自身を除く): 127961960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 290821, 581642, 1163284, 1454105, 2035747, 2326568, 2908210, 4071494, 5816420, 8142988, 10178735, 11632840, 16285976, 20357470, 40714940, 81429880]

約数ペア:

[(1, 81429880), (2, 40714940), (4, 20357470), (5, 16285976), (7, 11632840), (8, 10178735), (10, 8142988), (14, 5816420), (20, 4071494), (28, 2908210), (35, 2326568), (40, 2035747), (56, 1454105), (70, 1163284), (140, 581642), (280, 290821)]