123720560

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{90971}}^1$

素因数の和:91001

約数の個数: 40

約数和(自身を含む): 304574256

約数和(自身を除く): 180853696

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 90971, 181942, 363884, 454855, 727768, 909710, 1455536, 1546507, 1819420, 3093014, 3638840, 6186028, 7277680, 7732535, 12372056, 15465070, 24744112, 30930140, 61860280, 123720560]

約数ペア:

[(1, 123720560), (2, 61860280), (4, 30930140), (5, 24744112), (8, 15465070), (10, 12372056), (16, 7732535), (17, 7277680), (20, 6186028), (34, 3638840), (40, 3093014), (68, 1819420), (80, 1546507), (85, 1455536), (136, 909710), (170, 727768), (272, 454855), (340, 363884), (680, 181942), (1360, 90971)]