20728015

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{3167}}^1$

素因数の和:3207

約数の個数: 32

約数和(自身を含む): 32845824

約数和(自身を除く): 12117809

約数列:

[1, 5, 7, 11, 17, 35, 55, 77, 85, 119, 187, 385, 595, 935, 1309, 3167, 6545, 15835, 22169, 34837, 53839, 110845, 174185, 243859, 269195, 376873, 592229, 1219295, 1884365, 2961145, 4145603, 20728015]

約数ペア:

[(1, 20728015), (5, 4145603), (7, 2961145), (11, 1884365), (17, 1219295), (35, 592229), (55, 376873), (77, 269195), (85, 243859), (119, 174185), (187, 110845), (385, 53839), (595, 34837), (935, 22169), (1309, 15835), (3167, 6545)]