28151920

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{18521}}^1$

素因数の和:18553

約数の個数: 40

約数和(自身を含む): 68901840

約数和(自身を除く): 40749920

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 18521, 37042, 74084, 92605, 148168, 185210, 296336, 351899, 370420, 703798, 740840, 1407596, 1481680, 1759495, 2815192, 3518990, 5630384, 7037980, 14075960, 28151920]

約数ペア:

[(1, 28151920), (2, 14075960), (4, 7037980), (5, 5630384), (8, 3518990), (10, 2815192), (16, 1759495), (19, 1481680), (20, 1407596), (38, 740840), (40, 703798), (76, 370420), (80, 351899), (95, 296336), (152, 185210), (190, 148168), (304, 92605), (380, 74084), (760, 37042), (1520, 18521)]