20539220

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{197}}^1\times {\mathrm{401}}^1$

素因数の和:620

約数の個数: 48

約数和(自身を含む): 46802448

約数和(自身を除く): 26263228

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 197, 260, 394, 401, 788, 802, 985, 1604, 1970, 2005, 2561, 3940, 4010, 5122, 5213, 8020, 10244, 10426, 12805, 20852, 25610, 26065, 51220, 52130, 78997, 104260, 157994, 315988, 394985, 789970, 1026961, 1579940, 2053922, 4107844, 5134805, 10269610, 20539220]

約数ペア:

[(1, 20539220), (2, 10269610), (4, 5134805), (5, 4107844), (10, 2053922), (13, 1579940), (20, 1026961), (26, 789970), (52, 394985), (65, 315988), (130, 157994), (197, 104260), (260, 78997), (394, 52130), (401, 51220), (788, 26065), (802, 25610), (985, 20852), (1604, 12805), (1970, 10426), (2005, 10244), (2561, 8020), (3940, 5213), (4010, 5122)]