21484550

素因数分解:

$2^1\times 5^2\times {\mathrm{31}}^1\times {\mathrm{83}}^1\times {\mathrm{167}}^1$

素因数の和:293

約数の個数: 48

約数和(自身を含む): 41997312

約数和(自身を除く): 20512762

約数列:

[1, 2, 5, 10, 25, 31, 50, 62, 83, 155, 166, 167, 310, 334, 415, 775, 830, 835, 1550, 1670, 2075, 2573, 4150, 4175, 5146, 5177, 8350, 10354, 12865, 13861, 25730, 25885, 27722, 51770, 64325, 69305, 128650, 129425, 138610, 258850, 346525, 429691, 693050, 859382, 2148455, 4296910, 10742275, 21484550]

約数ペア:

[(1, 21484550), (2, 10742275), (5, 4296910), (10, 2148455), (25, 859382), (31, 693050), (50, 429691), (62, 346525), (83, 258850), (155, 138610), (166, 129425), (167, 128650), (310, 69305), (334, 64325), (415, 51770), (775, 27722), (830, 25885), (835, 25730), (1550, 13861), (1670, 12865), (2075, 10354), (2573, 8350), (4150, 5177), (4175, 5146)]