20822960

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{251}}^1$

素因数の和:342

約数の個数: 80

約数和(自身を含む): 52309152

約数和(自身を除く): 31486192

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 61, 68, 80, 85, 122, 136, 170, 244, 251, 272, 305, 340, 488, 502, 610, 680, 976, 1004, 1037, 1220, 1255, 1360, 2008, 2074, 2440, 2510, 4016, 4148, 4267, 4880, 5020, 5185, 8296, 8534, 10040, 10370, 15311, 16592, 17068, 20080, 20740, 21335, 30622, 34136, 41480, 42670, 61244, 68272, 76555, 82960, 85340, 122488, 153110, 170680, 244976, 260287, 306220, 341360, 520574, 612440, 1041148, 1224880, 1301435, 2082296, 2602870, 4164592, 5205740, 10411480, 20822960]

約数ペア:

[(1, 20822960), (2, 10411480), (4, 5205740), (5, 4164592), (8, 2602870), (10, 2082296), (16, 1301435), (17, 1224880), (20, 1041148), (34, 612440), (40, 520574), (61, 341360), (68, 306220), (80, 260287), (85, 244976), (122, 170680), (136, 153110), (170, 122488), (244, 85340), (251, 82960), (272, 76555), (305, 68272), (340, 61244), (488, 42670), (502, 41480), (610, 34136), (680, 30622), (976, 21335), (1004, 20740), (1037, 20080), (1220, 17068), (1255, 16592), (1360, 15311), (2008, 10370), (2074, 10040), (2440, 8534), (2510, 8296), (4016, 5185), (4148, 5020), (4267, 4880)]