20328440

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{983}}^1$

素因数の和:1052

約数の個数: 64

約数和(自身を含む): 51010560

約数和(自身を除く): 30682120

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 47, 55, 88, 94, 110, 188, 220, 235, 376, 440, 470, 517, 940, 983, 1034, 1880, 1966, 2068, 2585, 3932, 4136, 4915, 5170, 7864, 9830, 10340, 10813, 19660, 20680, 21626, 39320, 43252, 46201, 54065, 86504, 92402, 108130, 184804, 216260, 231005, 369608, 432520, 462010, 508211, 924020, 1016422, 1848040, 2032844, 2541055, 4065688, 5082110, 10164220, 20328440]

約数ペア:

[(1, 20328440), (2, 10164220), (4, 5082110), (5, 4065688), (8, 2541055), (10, 2032844), (11, 1848040), (20, 1016422), (22, 924020), (40, 508211), (44, 462010), (47, 432520), (55, 369608), (88, 231005), (94, 216260), (110, 184804), (188, 108130), (220, 92402), (235, 86504), (376, 54065), (440, 46201), (470, 43252), (517, 39320), (940, 21626), (983, 20680), (1034, 19660), (1880, 10813), (1966, 10340), (2068, 9830), (2585, 7864), (3932, 5170), (4136, 4915)]