21019780985

素因数分解:

$5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{463}}^1\times {\mathrm{1861}}^1$

素因数の和:2394

約数の個数: 64

約数和(自身を含む): 31351670784

約数和(自身を除く): 10331889799

約数列:

[1, 5, 7, 17, 35, 41, 85, 119, 205, 287, 463, 595, 697, 1435, 1861, 2315, 3241, 3485, 4879, 7871, 9305, 13027, 16205, 18983, 24395, 31637, 39355, 55097, 65135, 76301, 94915, 132881, 158185, 221459, 275485, 322711, 381505, 534107, 664405, 861643, 1107295, 1297117, 1613555, 2258977, 2670535, 4308215, 6031501, 6485585, 9079819, 11294885, 14647931, 30157505, 35327363, 45399095, 73239655, 102535517, 176636815, 247291541, 512677585, 600565171, 1236457705, 3002825855, 4203956197, 21019780985]

約数ペア:

[(1, 21019780985), (5, 4203956197), (7, 3002825855), (17, 1236457705), (35, 600565171), (41, 512677585), (85, 247291541), (119, 176636815), (205, 102535517), (287, 73239655), (463, 45399095), (595, 35327363), (697, 30157505), (1435, 14647931), (1861, 11294885), (2315, 9079819), (3241, 6485585), (3485, 6031501), (4879, 4308215), (7871, 2670535), (9305, 2258977), (13027, 1613555), (16205, 1297117), (18983, 1107295), (24395, 861643), (31637, 664405), (39355, 534107), (55097, 381505), (65135, 322711), (76301, 275485), (94915, 221459), (132881, 158185)]