28019775

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{53}}^2$

素因数の和:145

約数の個数: 72

約数和(自身を含む): 56801920

約数和(自身を除く): 28782145

約数列:

[1, 3, 5, 7, 15, 19, 21, 25, 35, 53, 57, 75, 95, 105, 133, 159, 175, 265, 285, 371, 399, 475, 525, 665, 795, 1007, 1113, 1325, 1425, 1855, 1995, 2809, 3021, 3325, 3975, 5035, 5565, 7049, 8427, 9275, 9975, 14045, 15105, 19663, 21147, 25175, 27825, 35245, 42135, 53371, 58989, 70225, 75525, 98315, 105735, 160113, 176225, 210675, 266855, 294945, 373597, 491575, 528675, 800565, 1120791, 1334275, 1474725, 1867985, 4002825, 5603955, 9339925, 28019775]

約数ペア:

[(1, 28019775), (3, 9339925), (5, 5603955), (7, 4002825), (15, 1867985), (19, 1474725), (21, 1334275), (25, 1120791), (35, 800565), (53, 528675), (57, 491575), (75, 373597), (95, 294945), (105, 266855), (133, 210675), (159, 176225), (175, 160113), (265, 105735), (285, 98315), (371, 75525), (399, 70225), (475, 58989), (525, 53371), (665, 42135), (795, 35245), (1007, 27825), (1113, 25175), (1325, 21147), (1425, 19663), (1855, 15105), (1995, 14045), (2809, 9975), (3021, 9275), (3325, 8427), (3975, 7049), (5035, 5565)]