28659980

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{199}}^1\times {\mathrm{379}}^1$

素因数の和:606

約数の個数: 48

約数和(自身を含む): 63840000

約数和(自身を除く): 35180020

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 199, 379, 380, 398, 758, 796, 995, 1516, 1895, 1990, 3781, 3790, 3980, 7201, 7562, 7580, 14402, 15124, 18905, 28804, 36005, 37810, 72010, 75421, 75620, 144020, 150842, 301684, 377105, 754210, 1432999, 1508420, 2865998, 5731996, 7164995, 14329990, 28659980]

約数ペア:

[(1, 28659980), (2, 14329990), (4, 7164995), (5, 5731996), (10, 2865998), (19, 1508420), (20, 1432999), (38, 754210), (76, 377105), (95, 301684), (190, 150842), (199, 144020), (379, 75620), (380, 75421), (398, 72010), (758, 37810), (796, 36005), (995, 28804), (1516, 18905), (1895, 15124), (1990, 14402), (3781, 7580), (3790, 7562), (3980, 7201)]