18242740

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{443}}^1$

素因数の和:552

約数の個数: 48

約数和(自身を含む): 40279680

約数和(自身を除く): 22036940

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 71, 116, 142, 145, 284, 290, 355, 443, 580, 710, 886, 1420, 1772, 2059, 2215, 4118, 4430, 8236, 8860, 10295, 12847, 20590, 25694, 31453, 41180, 51388, 62906, 64235, 125812, 128470, 157265, 256940, 314530, 629060, 912137, 1824274, 3648548, 4560685, 9121370, 18242740]

約数ペア:

[(1, 18242740), (2, 9121370), (4, 4560685), (5, 3648548), (10, 1824274), (20, 912137), (29, 629060), (58, 314530), (71, 256940), (116, 157265), (142, 128470), (145, 125812), (284, 64235), (290, 62906), (355, 51388), (443, 41180), (580, 31453), (710, 25694), (886, 20590), (1420, 12847), (1772, 10295), (2059, 8860), (2215, 8236), (4118, 4430)]