28139860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{29}}^2\times {\mathrm{239}}^1$

素因数の和:313

約数の個数: 72

約数和(自身を含む): 70237440

約数和(自身を除く): 42097580

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 29, 35, 58, 70, 116, 140, 145, 203, 239, 290, 406, 478, 580, 812, 841, 956, 1015, 1195, 1673, 1682, 2030, 2390, 3346, 3364, 4060, 4205, 4780, 5887, 6692, 6931, 8365, 8410, 11774, 13862, 16730, 16820, 23548, 27724, 29435, 33460, 34655, 48517, 58870, 69310, 97034, 117740, 138620, 194068, 200999, 242585, 401998, 485170, 803996, 970340, 1004995, 1406993, 2009990, 2813986, 4019980, 5627972, 7034965, 14069930, 28139860]

約数ペア:

[(1, 28139860), (2, 14069930), (4, 7034965), (5, 5627972), (7, 4019980), (10, 2813986), (14, 2009990), (20, 1406993), (28, 1004995), (29, 970340), (35, 803996), (58, 485170), (70, 401998), (116, 242585), (140, 200999), (145, 194068), (203, 138620), (239, 117740), (290, 97034), (406, 69310), (478, 58870), (580, 48517), (812, 34655), (841, 33460), (956, 29435), (1015, 27724), (1195, 23548), (1673, 16820), (1682, 16730), (2030, 13862), (2390, 11774), (3346, 8410), (3364, 8365), (4060, 6931), (4205, 6692), (4780, 5887)]