31681980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{16001}}^1$

素因数の和:16027

約数の個数: 72

約数和(自身を含む): 104845104

約数和(自身を除く): 73163124

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 30, 33, 36, 44, 45, 55, 60, 66, 90, 99, 110, 132, 165, 180, 198, 220, 330, 396, 495, 660, 990, 1980, 16001, 32002, 48003, 64004, 80005, 96006, 144009, 160010, 176011, 192012, 240015, 288018, 320020, 352022, 480030, 528033, 576036, 704044, 720045, 880055, 960060, 1056066, 1440090, 1584099, 1760110, 2112132, 2640165, 2880180, 3168198, 3520220, 5280330, 6336396, 7920495, 10560660, 15840990, 31681980]

約数ペア:

[(1, 31681980), (2, 15840990), (3, 10560660), (4, 7920495), (5, 6336396), (6, 5280330), (9, 3520220), (10, 3168198), (11, 2880180), (12, 2640165), (15, 2112132), (18, 1760110), (20, 1584099), (22, 1440090), (30, 1056066), (33, 960060), (36, 880055), (44, 720045), (45, 704044), (55, 576036), (60, 528033), (66, 480030), (90, 352022), (99, 320020), (110, 288018), (132, 240015), (165, 192012), (180, 176011), (198, 160010), (220, 144009), (330, 96006), (396, 80005), (495, 64004), (660, 48003), (990, 32002), (1980, 16001)]