991489040

素因数分解:

$2^4\times 5^1\times {\mathrm{181}}^1\times {\mathrm{68473}}^1$

素因数の和:68667

約数の個数: 40

約数和(自身を含む): 2317981848

約数和(自身を除く): 1326492808

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 181, 362, 724, 905, 1448, 1810, 2896, 3620, 7240, 14480, 68473, 136946, 273892, 342365, 547784, 684730, 1095568, 1369460, 2738920, 5477840, 12393613, 24787226, 49574452, 61968065, 99148904, 123936130, 198297808, 247872260, 495744520, 991489040]

約数ペア:

[(1, 991489040), (2, 495744520), (4, 247872260), (5, 198297808), (8, 123936130), (10, 99148904), (16, 61968065), (20, 49574452), (40, 24787226), (80, 12393613), (181, 5477840), (362, 2738920), (724, 1369460), (905, 1095568), (1448, 684730), (1810, 547784), (2896, 342365), (3620, 273892), (7240, 136946), (14480, 68473)]