21203539

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{127}}^1$

素因数の和:235

約数の個数: 32

約数和(自身を含む): 27426816

約数和(自身を除く): 6223277

約数列:

[1, 7, 17, 23, 61, 119, 127, 161, 391, 427, 889, 1037, 1403, 2159, 2737, 2921, 7259, 7747, 9821, 15113, 20447, 23851, 49657, 54229, 131699, 166957, 178181, 347599, 921893, 1247267, 3029077, 21203539]

約数ペア:

[(1, 21203539), (7, 3029077), (17, 1247267), (23, 921893), (61, 347599), (119, 178181), (127, 166957), (161, 131699), (391, 54229), (427, 49657), (889, 23851), (1037, 20447), (1403, 15113), (2159, 9821), (2737, 7747), (2921, 7259)]