20291778

素因数分解:

$2^1\times 3^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{5101}}^1$

素因数の和:5139

約数の個数: 48

約数和(自身を含む): 50142456

約数和(自身を除く): 29850678

約数列:

[1, 2, 3, 6, 9, 13, 17, 18, 26, 34, 39, 51, 78, 102, 117, 153, 221, 234, 306, 442, 663, 1326, 1989, 3978, 5101, 10202, 15303, 30606, 45909, 66313, 86717, 91818, 132626, 173434, 198939, 260151, 397878, 520302, 596817, 780453, 1127321, 1193634, 1560906, 2254642, 3381963, 6763926, 10145889, 20291778]

約数ペア:

[(1, 20291778), (2, 10145889), (3, 6763926), (6, 3381963), (9, 2254642), (13, 1560906), (17, 1193634), (18, 1127321), (26, 780453), (34, 596817), (39, 520302), (51, 397878), (78, 260151), (102, 198939), (117, 173434), (153, 132626), (221, 91818), (234, 86717), (306, 66313), (442, 45909), (663, 30606), (1326, 15303), (1989, 10202), (3978, 5101)]