19904760

素因数分解:

$2^3\times 3^2\times 5^1\times {\mathrm{55291}}^1$

素因数の和:55308

約数の個数: 48

約数和(自身を含む): 64691640

約数和(自身を除く): 44786880

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 30, 36, 40, 45, 60, 72, 90, 120, 180, 360, 55291, 110582, 165873, 221164, 276455, 331746, 442328, 497619, 552910, 663492, 829365, 995238, 1105820, 1326984, 1658730, 1990476, 2211640, 2488095, 3317460, 3980952, 4976190, 6634920, 9952380, 19904760]

約数ペア:

[(1, 19904760), (2, 9952380), (3, 6634920), (4, 4976190), (5, 3980952), (6, 3317460), (8, 2488095), (9, 2211640), (10, 1990476), (12, 1658730), (15, 1326984), (18, 1105820), (20, 995238), (24, 829365), (30, 663492), (36, 552910), (40, 497619), (45, 442328), (60, 331746), (72, 276455), (90, 221164), (120, 165873), (180, 110582), (360, 55291)]