20515694980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^2\times {\mathrm{258319}}^1$

素因数の和:258377

約数の個数: 72

約数和(自身を含む): 49603639680

約数和(自身を除く): 29087944700

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 38, 44, 55, 76, 95, 110, 190, 209, 220, 361, 380, 418, 722, 836, 1045, 1444, 1805, 2090, 3610, 3971, 4180, 7220, 7942, 15884, 19855, 39710, 79420, 258319, 516638, 1033276, 1291595, 2583190, 2841509, 4908061, 5166380, 5683018, 9816122, 11366036, 14207545, 19632244, 24540305, 28415090, 49080610, 53988671, 56830180, 93253159, 98161220, 107977342, 186506318, 215954684, 269943355, 373012636, 466265795, 539886710, 932531590, 1025784749, 1079773420, 1865063180, 2051569498, 4103138996, 5128923745, 10257847490, 20515694980]

約数ペア:

[(1, 20515694980), (2, 10257847490), (4, 5128923745), (5, 4103138996), (10, 2051569498), (11, 1865063180), (19, 1079773420), (20, 1025784749), (22, 932531590), (38, 539886710), (44, 466265795), (55, 373012636), (76, 269943355), (95, 215954684), (110, 186506318), (190, 107977342), (209, 98161220), (220, 93253159), (361, 56830180), (380, 53988671), (418, 49080610), (722, 28415090), (836, 24540305), (1045, 19632244), (1444, 14207545), (1805, 11366036), (2090, 9816122), (3610, 5683018), (3971, 5166380), (4180, 4908061), (7220, 2841509), (7942, 2583190), (15884, 1291595), (19855, 1033276), (39710, 516638), (79420, 258319)]