78490900

素因数分解:

$2^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{109}}^1\times {\mathrm{379}}^1$

素因数の和:521

約数の個数: 72

約数和(自身を含む): 181412000

約数和(自身を除く): 102921100

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 38, 50, 76, 95, 100, 109, 190, 218, 379, 380, 436, 475, 545, 758, 950, 1090, 1516, 1895, 1900, 2071, 2180, 2725, 3790, 4142, 5450, 7201, 7580, 8284, 9475, 10355, 10900, 14402, 18950, 20710, 28804, 36005, 37900, 41311, 41420, 51775, 72010, 82622, 103550, 144020, 165244, 180025, 206555, 207100, 360050, 413110, 720100, 784909, 826220, 1032775, 1569818, 2065550, 3139636, 3924545, 4131100, 7849090, 15698180, 19622725, 39245450, 78490900]

約数ペア:

[(1, 78490900), (2, 39245450), (4, 19622725), (5, 15698180), (10, 7849090), (19, 4131100), (20, 3924545), (25, 3139636), (38, 2065550), (50, 1569818), (76, 1032775), (95, 826220), (100, 784909), (109, 720100), (190, 413110), (218, 360050), (379, 207100), (380, 206555), (436, 180025), (475, 165244), (545, 144020), (758, 103550), (950, 82622), (1090, 72010), (1516, 51775), (1895, 41420), (1900, 41311), (2071, 37900), (2180, 36005), (2725, 28804), (3790, 20710), (4142, 18950), (5450, 14402), (7201, 10900), (7580, 10355), (8284, 9475)]