28521220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{15671}}^1$

素因数の和:15700

約数の個数: 48

約数和(自身を含む): 73721088

約数和(自身を除く): 45199868

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 182, 260, 364, 455, 910, 1820, 15671, 31342, 62684, 78355, 109697, 156710, 203723, 219394, 313420, 407446, 438788, 548485, 814892, 1018615, 1096970, 1426061, 2037230, 2193940, 2852122, 4074460, 5704244, 7130305, 14260610, 28521220]

約数ペア:

[(1, 28521220), (2, 14260610), (4, 7130305), (5, 5704244), (7, 4074460), (10, 2852122), (13, 2193940), (14, 2037230), (20, 1426061), (26, 1096970), (28, 1018615), (35, 814892), (52, 548485), (65, 438788), (70, 407446), (91, 313420), (130, 219394), (140, 203723), (182, 156710), (260, 109697), (364, 78355), (455, 62684), (910, 31342), (1820, 15671)]