20147985

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{101}}^1$

素因数の和:167

約数の個数: 96

約数和(自身を含む): 42771456

約数和(自身を除く): 22623471

約数列:

[1, 3, 5, 9, 11, 13, 15, 31, 33, 39, 45, 55, 65, 93, 99, 101, 117, 143, 155, 165, 195, 279, 303, 341, 403, 429, 465, 495, 505, 585, 715, 909, 1023, 1111, 1209, 1287, 1313, 1395, 1515, 1705, 2015, 2145, 3069, 3131, 3333, 3627, 3939, 4433, 4545, 5115, 5555, 6045, 6435, 6565, 9393, 9999, 11817, 13299, 14443, 15345, 15655, 16665, 18135, 19695, 22165, 28179, 34441, 39897, 40703, 43329, 46965, 49995, 59085, 66495, 72215, 103323, 122109, 129987, 140895, 172205, 199485, 203515, 216645, 309969, 366327, 447733, 516615, 610545, 649935, 1343199, 1549845, 1831635, 2238665, 4029597, 6715995, 20147985]

約数ペア:

[(1, 20147985), (3, 6715995), (5, 4029597), (9, 2238665), (11, 1831635), (13, 1549845), (15, 1343199), (31, 649935), (33, 610545), (39, 516615), (45, 447733), (55, 366327), (65, 309969), (93, 216645), (99, 203515), (101, 199485), (117, 172205), (143, 140895), (155, 129987), (165, 122109), (195, 103323), (279, 72215), (303, 66495), (341, 59085), (403, 49995), (429, 46965), (465, 43329), (495, 40703), (505, 39897), (585, 34441), (715, 28179), (909, 22165), (1023, 19695), (1111, 18135), (1209, 16665), (1287, 15655), (1313, 15345), (1395, 14443), (1515, 13299), (1705, 11817), (2015, 9999), (2145, 9393), (3069, 6565), (3131, 6435), (3333, 6045), (3627, 5555), (3939, 5115), (4433, 4545)]