20895805

素因数分解:

$5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{173}}^1$

素因数の和:238

約数の個数: 48

約数和(自身を含む): 32134320

約数和(自身を除く): 11238515

約数列:

[1, 5, 7, 17, 29, 35, 49, 85, 119, 145, 173, 203, 245, 493, 595, 833, 865, 1015, 1211, 1421, 2465, 2941, 3451, 4165, 5017, 6055, 7105, 8477, 14705, 17255, 20587, 24157, 25085, 35119, 42385, 85289, 102935, 120785, 144109, 175595, 245833, 426445, 597023, 720545, 1229165, 2985115, 4179161, 20895805]

約数ペア:

[(1, 20895805), (5, 4179161), (7, 2985115), (17, 1229165), (29, 720545), (35, 597023), (49, 426445), (85, 245833), (119, 175595), (145, 144109), (173, 120785), (203, 102935), (245, 85289), (493, 42385), (595, 35119), (833, 25085), (865, 24157), (1015, 20587), (1211, 17255), (1421, 14705), (2465, 8477), (2941, 7105), (3451, 6055), (4165, 5017)]