2105625520

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{641959}}^1$

素因数の和:642013

約数の個数: 40

約数和(自身を含む): 5014991520

約数和(自身を除く): 2909366000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 3280, 641959, 1283918, 2567836, 3209795, 5135672, 6419590, 10271344, 12839180, 25678360, 26320319, 51356720, 52640638, 105281276, 131601595, 210562552, 263203190, 421125104, 526406380, 1052812760, 2105625520]

約数ペア:

[(1, 2105625520), (2, 1052812760), (4, 526406380), (5, 421125104), (8, 263203190), (10, 210562552), (16, 131601595), (20, 105281276), (40, 52640638), (41, 51356720), (80, 26320319), (82, 25678360), (164, 12839180), (205, 10271344), (328, 6419590), (410, 5135672), (656, 3209795), (820, 2567836), (1640, 1283918), (3280, 641959)]