20728890

素因数分解:

$2^1\times 3^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{2531}}^1$

素因数の和:2564

約数の個数: 96

約数和(自身を含む): 66358656

約数和(自身を除く): 45629766

約数列:

[1, 2, 3, 5, 6, 7, 9, 10, 13, 14, 15, 18, 21, 26, 30, 35, 39, 42, 45, 63, 65, 70, 78, 90, 91, 105, 117, 126, 130, 182, 195, 210, 234, 273, 315, 390, 455, 546, 585, 630, 819, 910, 1170, 1365, 1638, 2531, 2730, 4095, 5062, 7593, 8190, 12655, 15186, 17717, 22779, 25310, 32903, 35434, 37965, 45558, 53151, 65806, 75930, 88585, 98709, 106302, 113895, 159453, 164515, 177170, 197418, 227790, 230321, 265755, 296127, 318906, 329030, 460642, 493545, 531510, 592254, 690963, 797265, 987090, 1151605, 1381926, 1480635, 1594530, 2072889, 2303210, 2961270, 3454815, 4145778, 6909630, 10364445, 20728890]

約数ペア:

[(1, 20728890), (2, 10364445), (3, 6909630), (5, 4145778), (6, 3454815), (7, 2961270), (9, 2303210), (10, 2072889), (13, 1594530), (14, 1480635), (15, 1381926), (18, 1151605), (21, 987090), (26, 797265), (30, 690963), (35, 592254), (39, 531510), (42, 493545), (45, 460642), (63, 329030), (65, 318906), (70, 296127), (78, 265755), (90, 230321), (91, 227790), (105, 197418), (117, 177170), (126, 164515), (130, 159453), (182, 113895), (195, 106302), (210, 98709), (234, 88585), (273, 75930), (315, 65806), (390, 53151), (455, 45558), (546, 37965), (585, 35434), (630, 32903), (819, 25310), (910, 22779), (1170, 17717), (1365, 15186), (1638, 12655), (2531, 8190), (2730, 7593), (4095, 5062)]