20783511

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{97}}^1\times {\mathrm{179}}^1$

素因数の和:308

約数の個数: 48

約数和(自身を含む): 36691200

約数和(自身を除く): 15907689

約数列:

[1, 3, 7, 9, 19, 21, 57, 63, 97, 133, 171, 179, 291, 399, 537, 679, 873, 1197, 1253, 1611, 1843, 2037, 3401, 3759, 5529, 6111, 10203, 11277, 12901, 16587, 17363, 23807, 30609, 38703, 52089, 71421, 116109, 121541, 156267, 214263, 329897, 364623, 989691, 1093869, 2309279, 2969073, 6927837, 20783511]

約数ペア:

[(1, 20783511), (3, 6927837), (7, 2969073), (9, 2309279), (19, 1093869), (21, 989691), (57, 364623), (63, 329897), (97, 214263), (133, 156267), (171, 121541), (179, 116109), (291, 71421), (399, 52089), (537, 38703), (679, 30609), (873, 23807), (1197, 17363), (1253, 16587), (1611, 12901), (1843, 11277), (2037, 10203), (3401, 6111), (3759, 5529)]