20640720

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{5059}}^1$

素因数の和:5092

約数の個数: 80

約数和(自身を含む): 67763520

約数和(自身を除く): 47122800

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 17, 20, 24, 30, 34, 40, 48, 51, 60, 68, 80, 85, 102, 120, 136, 170, 204, 240, 255, 272, 340, 408, 510, 680, 816, 1020, 1360, 2040, 4080, 5059, 10118, 15177, 20236, 25295, 30354, 40472, 50590, 60708, 75885, 80944, 86003, 101180, 121416, 151770, 172006, 202360, 242832, 258009, 303540, 344012, 404720, 430015, 516018, 607080, 688024, 860030, 1032036, 1214160, 1290045, 1376048, 1720060, 2064072, 2580090, 3440120, 4128144, 5160180, 6880240, 10320360, 20640720]

約数ペア:

[(1, 20640720), (2, 10320360), (3, 6880240), (4, 5160180), (5, 4128144), (6, 3440120), (8, 2580090), (10, 2064072), (12, 1720060), (15, 1376048), (16, 1290045), (17, 1214160), (20, 1032036), (24, 860030), (30, 688024), (34, 607080), (40, 516018), (48, 430015), (51, 404720), (60, 344012), (68, 303540), (80, 258009), (85, 242832), (102, 202360), (120, 172006), (136, 151770), (170, 121416), (204, 101180), (240, 86003), (255, 80944), (272, 75885), (340, 60708), (408, 50590), (510, 40472), (680, 30354), (816, 25295), (1020, 20236), (1360, 15177), (2040, 10118), (4080, 5059)]