81748280

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{22963}}^1$

素因数の和:23063

約数の個数: 32

約数和(自身を含む): 186008400

約数和(自身を除く): 104260120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3560, 22963, 45926, 91852, 114815, 183704, 229630, 459260, 918520, 2043707, 4087414, 8174828, 10218535, 16349656, 20437070, 40874140, 81748280]

約数ペア:

[(1, 81748280), (2, 40874140), (4, 20437070), (5, 16349656), (8, 10218535), (10, 8174828), (20, 4087414), (40, 2043707), (89, 918520), (178, 459260), (356, 229630), (445, 183704), (712, 114815), (890, 91852), (1780, 45926), (3560, 22963)]