18391120

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{20899}}^1$

素因数の和:20923

約数の個数: 40

約数和(自身を含む): 46648800

約数和(自身を除く): 28257680

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 20899, 41798, 83596, 104495, 167192, 208990, 229889, 334384, 417980, 459778, 835960, 919556, 1149445, 1671920, 1839112, 2298890, 3678224, 4597780, 9195560, 18391120]

約数ペア:

[(1, 18391120), (2, 9195560), (4, 4597780), (5, 3678224), (8, 2298890), (10, 1839112), (11, 1671920), (16, 1149445), (20, 919556), (22, 835960), (40, 459778), (44, 417980), (55, 334384), (80, 229889), (88, 208990), (110, 167192), (176, 104495), (220, 83596), (440, 41798), (880, 20899)]