8720920

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{541}}^1$

素因数の和:596

約数の個数: 64

約数和(自身を含む): 21853440

約数和(自身を除く): 13132520

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, 541, 620, 806, 1082, 1240, 1612, 2015, 2164, 2705, 3224, 4030, 4328, 5410, 7033, 8060, 10820, 14066, 16120, 16771, 21640, 28132, 33542, 35165, 56264, 67084, 70330, 83855, 134168, 140660, 167710, 218023, 281320, 335420, 436046, 670840, 872092, 1090115, 1744184, 2180230, 4360460, 8720920]

約数ペア:

[(1, 8720920), (2, 4360460), (4, 2180230), (5, 1744184), (8, 1090115), (10, 872092), (13, 670840), (20, 436046), (26, 335420), (31, 281320), (40, 218023), (52, 167710), (62, 140660), (65, 134168), (104, 83855), (124, 70330), (130, 67084), (155, 56264), (248, 35165), (260, 33542), (310, 28132), (403, 21640), (520, 16771), (541, 16120), (620, 14066), (806, 10820), (1082, 8060), (1240, 7033), (1612, 5410), (2015, 4328), (2164, 4030), (2705, 3224)]