21262280

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{1319}}^1$

素因数の和:1374

約数の個数: 64

約数和(自身を含む): 53222400

約数和(自身を除く): 31960120

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, 1319, 1612, 2015, 2638, 3224, 4030, 5276, 6595, 8060, 10552, 13190, 16120, 17147, 26380, 34294, 40889, 52760, 68588, 81778, 85735, 137176, 163556, 171470, 204445, 327112, 342940, 408890, 531557, 685880, 817780, 1063114, 1635560, 2126228, 2657785, 4252456, 5315570, 10631140, 21262280]

約数ペア:

[(1, 21262280), (2, 10631140), (4, 5315570), (5, 4252456), (8, 2657785), (10, 2126228), (13, 1635560), (20, 1063114), (26, 817780), (31, 685880), (40, 531557), (52, 408890), (62, 342940), (65, 327112), (104, 204445), (124, 171470), (130, 163556), (155, 137176), (248, 85735), (260, 81778), (310, 68588), (403, 52760), (520, 40889), (620, 34294), (806, 26380), (1240, 17147), (1319, 16120), (1612, 13190), (2015, 10552), (2638, 8060), (3224, 6595), (4030, 5276)]