21158120

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{113}}^1\times {\mathrm{151}}^1$

素因数の和:306

約数の個数: 64

約数和(自身を含む): 49904640

約数和(自身を除く): 28746520

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 113, 124, 151, 155, 226, 248, 302, 310, 452, 565, 604, 620, 755, 904, 1130, 1208, 1240, 1510, 2260, 3020, 3503, 4520, 4681, 6040, 7006, 9362, 14012, 17063, 17515, 18724, 23405, 28024, 34126, 35030, 37448, 46810, 68252, 70060, 85315, 93620, 136504, 140120, 170630, 187240, 341260, 528953, 682520, 1057906, 2115812, 2644765, 4231624, 5289530, 10579060, 21158120]

約数ペア:

[(1, 21158120), (2, 10579060), (4, 5289530), (5, 4231624), (8, 2644765), (10, 2115812), (20, 1057906), (31, 682520), (40, 528953), (62, 341260), (113, 187240), (124, 170630), (151, 140120), (155, 136504), (226, 93620), (248, 85315), (302, 70060), (310, 68252), (452, 46810), (565, 37448), (604, 35030), (620, 34126), (755, 28024), (904, 23405), (1130, 18724), (1208, 17515), (1240, 17063), (1510, 14012), (2260, 9362), (3020, 7006), (3503, 6040), (4520, 4681)]