16920720

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{331}}^1$

素因数の和:421

約数の個数: 120

約数和(自身を含む): 57799872

約数和(自身を除く): 40879152

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 71, 72, 80, 90, 120, 142, 144, 180, 213, 240, 284, 331, 355, 360, 426, 568, 639, 662, 710, 720, 852, 993, 1065, 1136, 1278, 1324, 1420, 1655, 1704, 1986, 2130, 2556, 2648, 2840, 2979, 3195, 3310, 3408, 3972, 4260, 4965, 5112, 5296, 5680, 5958, 6390, 6620, 7944, 8520, 9930, 10224, 11916, 12780, 13240, 14895, 15888, 17040, 19860, 23501, 23832, 25560, 26480, 29790, 39720, 47002, 47664, 51120, 59580, 70503, 79440, 94004, 117505, 119160, 141006, 188008, 211509, 235010, 238320, 282012, 352515, 376016, 423018, 470020, 564024, 705030, 846036, 940040, 1057545, 1128048, 1410060, 1692072, 1880080, 2115090, 2820120, 3384144, 4230180, 5640240, 8460360, 16920720]

約数ペア:

[(1, 16920720), (2, 8460360), (3, 5640240), (4, 4230180), (5, 3384144), (6, 2820120), (8, 2115090), (9, 1880080), (10, 1692072), (12, 1410060), (15, 1128048), (16, 1057545), (18, 940040), (20, 846036), (24, 705030), (30, 564024), (36, 470020), (40, 423018), (45, 376016), (48, 352515), (60, 282012), (71, 238320), (72, 235010), (80, 211509), (90, 188008), (120, 141006), (142, 119160), (144, 117505), (180, 94004), (213, 79440), (240, 70503), (284, 59580), (331, 51120), (355, 47664), (360, 47002), (426, 39720), (568, 29790), (639, 26480), (662, 25560), (710, 23832), (720, 23501), (852, 19860), (993, 17040), (1065, 15888), (1136, 14895), (1278, 13240), (1324, 12780), (1420, 11916), (1655, 10224), (1704, 9930), (1986, 8520), (2130, 7944), (2556, 6620), (2648, 6390), (2840, 5958), (2979, 5680), (3195, 5296), (3310, 5112), (3408, 4965), (3972, 4260)]