398889520

素因数分解:

$2^4\times 5^1\times {\mathrm{73}}^1\times {\mathrm{167}}^1\times {\mathrm{409}}^1$

素因数の和:662

約数の個数: 80

約数和(自身を含む): 948064320

約数和(自身を除く): 549174800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 73, 80, 146, 167, 292, 334, 365, 409, 584, 668, 730, 818, 835, 1168, 1336, 1460, 1636, 1670, 2045, 2672, 2920, 3272, 3340, 4090, 5840, 6544, 6680, 8180, 12191, 13360, 16360, 24382, 29857, 32720, 48764, 59714, 60955, 68303, 97528, 119428, 121910, 136606, 149285, 195056, 238856, 243820, 273212, 298570, 341515, 477712, 487640, 546424, 597140, 683030, 975280, 1092848, 1194280, 1366060, 2388560, 2732120, 4986119, 5464240, 9972238, 19944476, 24930595, 39888952, 49861190, 79777904, 99722380, 199444760, 398889520]

約数ペア:

[(1, 398889520), (2, 199444760), (4, 99722380), (5, 79777904), (8, 49861190), (10, 39888952), (16, 24930595), (20, 19944476), (40, 9972238), (73, 5464240), (80, 4986119), (146, 2732120), (167, 2388560), (292, 1366060), (334, 1194280), (365, 1092848), (409, 975280), (584, 683030), (668, 597140), (730, 546424), (818, 487640), (835, 477712), (1168, 341515), (1336, 298570), (1460, 273212), (1636, 243820), (1670, 238856), (2045, 195056), (2672, 149285), (2920, 136606), (3272, 121910), (3340, 119428), (4090, 97528), (5840, 68303), (6544, 60955), (6680, 59714), (8180, 48764), (12191, 32720), (13360, 29857), (16360, 24382)]