20485325

素因数分解:

$5^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{101}}^1$

素因数の和:198

約数の個数: 48

約数和(自身を含む): 31367040

約数和(自身を除く): 10881715

約数列:

[1, 5, 7, 19, 25, 35, 61, 95, 101, 133, 175, 305, 427, 475, 505, 665, 707, 1159, 1525, 1919, 2135, 2525, 3325, 3535, 5795, 6161, 8113, 9595, 10675, 13433, 17675, 28975, 30805, 40565, 43127, 47975, 67165, 117059, 154025, 202825, 215635, 335825, 585295, 819413, 1078175, 2926475, 4097065, 20485325]

約数ペア:

[(1, 20485325), (5, 4097065), (7, 2926475), (19, 1078175), (25, 819413), (35, 585295), (61, 335825), (95, 215635), (101, 202825), (133, 154025), (175, 117059), (305, 67165), (427, 47975), (475, 43127), (505, 40565), (665, 30805), (707, 28975), (1159, 17675), (1525, 13433), (1919, 10675), (2135, 9595), (2525, 8113), (3325, 6161), (3535, 5795)]