21639320

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{547}}^1$

素因数の和:624

約数の個数: 64

約数和(自身を含む): 52081920

約数和(自身を除く): 30442600

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 43, 46, 86, 92, 115, 172, 184, 215, 230, 344, 430, 460, 547, 860, 920, 989, 1094, 1720, 1978, 2188, 2735, 3956, 4376, 4945, 5470, 7912, 9890, 10940, 12581, 19780, 21880, 23521, 25162, 39560, 47042, 50324, 62905, 94084, 100648, 117605, 125810, 188168, 235210, 251620, 470420, 503240, 540983, 940840, 1081966, 2163932, 2704915, 4327864, 5409830, 10819660, 21639320]

約数ペア:

[(1, 21639320), (2, 10819660), (4, 5409830), (5, 4327864), (8, 2704915), (10, 2163932), (20, 1081966), (23, 940840), (40, 540983), (43, 503240), (46, 470420), (86, 251620), (92, 235210), (115, 188168), (172, 125810), (184, 117605), (215, 100648), (230, 94084), (344, 62905), (430, 50324), (460, 47042), (547, 39560), (860, 25162), (920, 23521), (989, 21880), (1094, 19780), (1720, 12581), (1978, 10940), (2188, 9890), (2735, 7912), (3956, 5470), (4376, 4945)]