20665040

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{1021}}^1$

素因数の和:1068

約数の個数: 80

約数和(自身を含む): 54746496

約数和(自身を除く): 34081456

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 23, 40, 44, 46, 55, 80, 88, 92, 110, 115, 176, 184, 220, 230, 253, 368, 440, 460, 506, 880, 920, 1012, 1021, 1265, 1840, 2024, 2042, 2530, 4048, 4084, 5060, 5105, 8168, 10120, 10210, 11231, 16336, 20240, 20420, 22462, 23483, 40840, 44924, 46966, 56155, 81680, 89848, 93932, 112310, 117415, 179696, 187864, 224620, 234830, 258313, 375728, 449240, 469660, 516626, 898480, 939320, 1033252, 1291565, 1878640, 2066504, 2583130, 4133008, 5166260, 10332520, 20665040]

約数ペア:

[(1, 20665040), (2, 10332520), (4, 5166260), (5, 4133008), (8, 2583130), (10, 2066504), (11, 1878640), (16, 1291565), (20, 1033252), (22, 939320), (23, 898480), (40, 516626), (44, 469660), (46, 449240), (55, 375728), (80, 258313), (88, 234830), (92, 224620), (110, 187864), (115, 179696), (176, 117415), (184, 112310), (220, 93932), (230, 89848), (253, 81680), (368, 56155), (440, 46966), (460, 44924), (506, 40840), (880, 23483), (920, 22462), (1012, 20420), (1021, 20240), (1265, 16336), (1840, 11231), (2024, 10210), (2042, 10120), (2530, 8168), (4048, 5105), (4084, 5060)]