20865645

素因数分解:

$3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{59}}^1\times {\mathrm{271}}^1$

素因数の和:370

約数の個数: 48

約数和(自身を含む): 38188800

約数和(自身を除く): 17323155

約数列:

[1, 3, 5, 9, 15, 29, 45, 59, 87, 145, 177, 261, 271, 295, 435, 531, 813, 885, 1305, 1355, 1711, 2439, 2655, 4065, 5133, 7859, 8555, 12195, 15399, 15989, 23577, 25665, 39295, 47967, 70731, 76995, 79945, 117885, 143901, 239835, 353655, 463681, 719505, 1391043, 2318405, 4173129, 6955215, 20865645]

約数ペア:

[(1, 20865645), (3, 6955215), (5, 4173129), (9, 2318405), (15, 1391043), (29, 719505), (45, 463681), (59, 353655), (87, 239835), (145, 143901), (177, 117885), (261, 79945), (271, 76995), (295, 70731), (435, 47967), (531, 39295), (813, 25665), (885, 23577), (1305, 15989), (1355, 15399), (1711, 12195), (2439, 8555), (2655, 7859), (4065, 5133)]