20814975

素因数分解:

$3^4\times 5^2\times {\mathrm{19}}^1\times {\mathrm{541}}^1$

素因数の和:582

約数の個数: 60

約数和(自身を含む): 40660840

約数和(自身を除く): 19845865

約数列:

[1, 3, 5, 9, 15, 19, 25, 27, 45, 57, 75, 81, 95, 135, 171, 225, 285, 405, 475, 513, 541, 675, 855, 1425, 1539, 1623, 2025, 2565, 2705, 4275, 4869, 7695, 8115, 10279, 12825, 13525, 14607, 24345, 30837, 38475, 40575, 43821, 51395, 73035, 92511, 121725, 154185, 219105, 256975, 277533, 365175, 462555, 770925, 832599, 1095525, 1387665, 2312775, 4162995, 6938325, 20814975]

約数ペア:

[(1, 20814975), (3, 6938325), (5, 4162995), (9, 2312775), (15, 1387665), (19, 1095525), (25, 832599), (27, 770925), (45, 462555), (57, 365175), (75, 277533), (81, 256975), (95, 219105), (135, 154185), (171, 121725), (225, 92511), (285, 73035), (405, 51395), (475, 43821), (513, 40575), (541, 38475), (675, 30837), (855, 24345), (1425, 14607), (1539, 13525), (1623, 12825), (2025, 10279), (2565, 8115), (2705, 7695), (4275, 4869)]