28311920

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{3889}}^1$

素因数の和:3922

約数の個数: 80

約数和(自身を含む): 81036480

約数和(自身を除く): 52724560

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, 3640, 3889, 7280, 7778, 15556, 19445, 27223, 31112, 38890, 50557, 54446, 62224, 77780, 101114, 108892, 136115, 155560, 202228, 217784, 252785, 272230, 311120, 353899, 404456, 435568, 505570, 544460, 707798, 808912, 1011140, 1088920, 1415596, 1769495, 2022280, 2177840, 2831192, 3538990, 4044560, 5662384, 7077980, 14155960, 28311920]

約数ペア:

[(1, 28311920), (2, 14155960), (4, 7077980), (5, 5662384), (7, 4044560), (8, 3538990), (10, 2831192), (13, 2177840), (14, 2022280), (16, 1769495), (20, 1415596), (26, 1088920), (28, 1011140), (35, 808912), (40, 707798), (52, 544460), (56, 505570), (65, 435568), (70, 404456), (80, 353899), (91, 311120), (104, 272230), (112, 252785), (130, 217784), (140, 202228), (182, 155560), (208, 136115), (260, 108892), (280, 101114), (364, 77780), (455, 62224), (520, 54446), (560, 50557), (728, 38890), (910, 31112), (1040, 27223), (1456, 19445), (1820, 15556), (3640, 7778), (3889, 7280)]