20665827

素因数分解:

$3^3\times 7^1\times {\mathrm{13}}^2\times {\mathrm{647}}^1$

素因数の和:689

約数の個数: 48

約数和(自身を含む): 37946880

約数和(自身を除く): 17281053

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 63, 91, 117, 169, 189, 273, 351, 507, 647, 819, 1183, 1521, 1941, 2457, 3549, 4529, 4563, 5823, 8411, 10647, 13587, 17469, 25233, 31941, 40761, 58877, 75699, 109343, 122283, 176631, 227097, 328029, 529893, 765401, 984087, 1589679, 2296203, 2952261, 6888609, 20665827]

約数ペア:

[(1, 20665827), (3, 6888609), (7, 2952261), (9, 2296203), (13, 1589679), (21, 984087), (27, 765401), (39, 529893), (63, 328029), (91, 227097), (117, 176631), (169, 122283), (189, 109343), (273, 75699), (351, 58877), (507, 40761), (647, 31941), (819, 25233), (1183, 17469), (1521, 13587), (1941, 10647), (2457, 8411), (3549, 5823), (4529, 4563)]