28778920

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^2\times {\mathrm{1993}}^1$

素因数の和:2042

約数の個数: 48

約数和(自身を含む): 68374260

約数和(自身を除く): 39595340

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 190, 361, 380, 722, 760, 1444, 1805, 1993, 2888, 3610, 3986, 7220, 7972, 9965, 14440, 15944, 19930, 37867, 39860, 75734, 79720, 151468, 189335, 302936, 378670, 719473, 757340, 1438946, 1514680, 2877892, 3597365, 5755784, 7194730, 14389460, 28778920]

約数ペア:

[(1, 28778920), (2, 14389460), (4, 7194730), (5, 5755784), (8, 3597365), (10, 2877892), (19, 1514680), (20, 1438946), (38, 757340), (40, 719473), (76, 378670), (95, 302936), (152, 189335), (190, 151468), (361, 79720), (380, 75734), (722, 39860), (760, 37867), (1444, 19930), (1805, 15944), (1993, 14440), (2888, 9965), (3610, 7972), (3986, 7220)]