21779440

素因数分解:

$2^4\times 5^1\times {\mathrm{61}}^1\times {\mathrm{4463}}^1$

素因数の和:4537

約数の個数: 40

約数和(自身を含む): 51478848

約数和(自身を除く): 29699408

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 61, 80, 122, 244, 305, 488, 610, 976, 1220, 2440, 4463, 4880, 8926, 17852, 22315, 35704, 44630, 71408, 89260, 178520, 272243, 357040, 544486, 1088972, 1361215, 2177944, 2722430, 4355888, 5444860, 10889720, 21779440]

約数ペア:

[(1, 21779440), (2, 10889720), (4, 5444860), (5, 4355888), (8, 2722430), (10, 2177944), (16, 1361215), (20, 1088972), (40, 544486), (61, 357040), (80, 272243), (122, 178520), (244, 89260), (305, 71408), (488, 44630), (610, 35704), (976, 22315), (1220, 17852), (2440, 8926), (4463, 4880)]