261933880

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{16249}}^1$

素因数の和:16304

約数の個数: 64

約数和(自身を含む): 655200000

約数和(自身を除く): 393266120

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 31, 40, 52, 62, 65, 104, 124, 130, 155, 248, 260, 310, 403, 520, 620, 806, 1240, 1612, 2015, 3224, 4030, 8060, 16120, 16249, 32498, 64996, 81245, 129992, 162490, 211237, 324980, 422474, 503719, 649960, 844948, 1007438, 1056185, 1689896, 2014876, 2112370, 2518595, 4029752, 4224740, 5037190, 6548347, 8449480, 10074380, 13096694, 20148760, 26193388, 32741735, 52386776, 65483470, 130966940, 261933880]

約数ペア:

[(1, 261933880), (2, 130966940), (4, 65483470), (5, 52386776), (8, 32741735), (10, 26193388), (13, 20148760), (20, 13096694), (26, 10074380), (31, 8449480), (40, 6548347), (52, 5037190), (62, 4224740), (65, 4029752), (104, 2518595), (124, 2112370), (130, 2014876), (155, 1689896), (248, 1056185), (260, 1007438), (310, 844948), (403, 649960), (520, 503719), (620, 422474), (806, 324980), (1240, 211237), (1612, 162490), (2015, 129992), (3224, 81245), (4030, 64996), (8060, 32498), (16120, 16249)]