19954480

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{2741}}^1$

素因数の和:2774

約数の個数: 80

約数和(自身を含む): 57121344

約数和(自身を除く): 37166864

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 26, 28, 35, 40, 52, 56, 65, 70, 80, 91, 104, 112, 130, 140, 182, 208, 260, 280, 364, 455, 520, 560, 728, 910, 1040, 1456, 1820, 2741, 3640, 5482, 7280, 10964, 13705, 19187, 21928, 27410, 35633, 38374, 43856, 54820, 71266, 76748, 95935, 109640, 142532, 153496, 178165, 191870, 219280, 249431, 285064, 306992, 356330, 383740, 498862, 570128, 712660, 767480, 997724, 1247155, 1425320, 1534960, 1995448, 2494310, 2850640, 3990896, 4988620, 9977240, 19954480]

約数ペア:

[(1, 19954480), (2, 9977240), (4, 4988620), (5, 3990896), (7, 2850640), (8, 2494310), (10, 1995448), (13, 1534960), (14, 1425320), (16, 1247155), (20, 997724), (26, 767480), (28, 712660), (35, 570128), (40, 498862), (52, 383740), (56, 356330), (65, 306992), (70, 285064), (80, 249431), (91, 219280), (104, 191870), (112, 178165), (130, 153496), (140, 142532), (182, 109640), (208, 95935), (260, 76748), (280, 71266), (364, 54820), (455, 43856), (520, 38374), (560, 35633), (728, 27410), (910, 21928), (1040, 19187), (1456, 13705), (1820, 10964), (2741, 7280), (3640, 5482)]