820912240

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{331013}}^1$

素因数の和:331057

約数の個数: 40

約数和(自身を含む): 1970195328

約数和(自身を除く): 1149283088

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 331013, 662026, 1324052, 1655065, 2648104, 3310130, 5296208, 6620260, 10261403, 13240520, 20522806, 26481040, 41045612, 51307015, 82091224, 102614030, 164182448, 205228060, 410456120, 820912240]

約数ペア:

[(1, 820912240), (2, 410456120), (4, 205228060), (5, 164182448), (8, 102614030), (10, 82091224), (16, 51307015), (20, 41045612), (31, 26481040), (40, 20522806), (62, 13240520), (80, 10261403), (124, 6620260), (155, 5296208), (248, 3310130), (310, 2648104), (496, 1655065), (620, 1324052), (1240, 662026), (2480, 331013)]