20156445

素因数分解:

$3^4\times 5^1\times {\mathrm{157}}^1\times {\mathrm{317}}^1$

素因数の和:491

約数の個数: 40

約数和(自身を含む): 36477144

約数和(自身を除く): 16320699

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 157, 317, 405, 471, 785, 951, 1413, 1585, 2355, 2853, 4239, 4755, 7065, 8559, 12717, 14265, 21195, 25677, 42795, 49769, 63585, 128385, 149307, 248845, 447921, 746535, 1343763, 2239605, 4031289, 6718815, 20156445]

約数ペア:

[(1, 20156445), (3, 6718815), (5, 4031289), (9, 2239605), (15, 1343763), (27, 746535), (45, 447921), (81, 248845), (135, 149307), (157, 128385), (317, 63585), (405, 49769), (471, 42795), (785, 25677), (951, 21195), (1413, 14265), (1585, 12717), (2355, 8559), (2853, 7065), (4239, 4755)]