261885520

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{8123}}^1$

素因数の和:8180

約数の個数: 80

約数和(自身を含む): 676956672

約数和(自身を除く): 415071152

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 31, 40, 52, 62, 65, 80, 104, 124, 130, 155, 208, 248, 260, 310, 403, 496, 520, 620, 806, 1040, 1240, 1612, 2015, 2480, 3224, 4030, 6448, 8060, 8123, 16120, 16246, 32240, 32492, 40615, 64984, 81230, 105599, 129968, 162460, 211198, 251813, 324920, 422396, 503626, 527995, 649840, 844792, 1007252, 1055990, 1259065, 1689584, 2014504, 2111980, 2518130, 3273569, 4029008, 4223960, 5036260, 6547138, 8447920, 10072520, 13094276, 16367845, 20145040, 26188552, 32735690, 52377104, 65471380, 130942760, 261885520]

約数ペア:

[(1, 261885520), (2, 130942760), (4, 65471380), (5, 52377104), (8, 32735690), (10, 26188552), (13, 20145040), (16, 16367845), (20, 13094276), (26, 10072520), (31, 8447920), (40, 6547138), (52, 5036260), (62, 4223960), (65, 4029008), (80, 3273569), (104, 2518130), (124, 2111980), (130, 2014504), (155, 1689584), (208, 1259065), (248, 1055990), (260, 1007252), (310, 844792), (403, 649840), (496, 527995), (520, 503626), (620, 422396), (806, 324920), (1040, 251813), (1240, 211198), (1612, 162460), (2015, 129968), (2480, 105599), (3224, 81230), (4030, 64984), (6448, 40615), (8060, 32492), (8123, 32240), (16120, 16246)]