20991840

素因数分解:

$2^5\times 3^1\times 5^1\times {\mathrm{101}}^1\times {\mathrm{433}}^1$

素因数の和:552

約数の個数: 96

約数和(自身を含む): 66933216

約数和(自身を除く): 45941376

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 48, 60, 80, 96, 101, 120, 160, 202, 240, 303, 404, 433, 480, 505, 606, 808, 866, 1010, 1212, 1299, 1515, 1616, 1732, 2020, 2165, 2424, 2598, 3030, 3232, 3464, 4040, 4330, 4848, 5196, 6060, 6495, 6928, 8080, 8660, 9696, 10392, 12120, 12990, 13856, 16160, 17320, 20784, 24240, 25980, 34640, 41568, 43733, 48480, 51960, 69280, 87466, 103920, 131199, 174932, 207840, 218665, 262398, 349864, 437330, 524796, 655995, 699728, 874660, 1049592, 1311990, 1399456, 1749320, 2099184, 2623980, 3498640, 4198368, 5247960, 6997280, 10495920, 20991840]

約数ペア:

[(1, 20991840), (2, 10495920), (3, 6997280), (4, 5247960), (5, 4198368), (6, 3498640), (8, 2623980), (10, 2099184), (12, 1749320), (15, 1399456), (16, 1311990), (20, 1049592), (24, 874660), (30, 699728), (32, 655995), (40, 524796), (48, 437330), (60, 349864), (80, 262398), (96, 218665), (101, 207840), (120, 174932), (160, 131199), (202, 103920), (240, 87466), (303, 69280), (404, 51960), (433, 48480), (480, 43733), (505, 41568), (606, 34640), (808, 25980), (866, 24240), (1010, 20784), (1212, 17320), (1299, 16160), (1515, 13856), (1616, 12990), (1732, 12120), (2020, 10392), (2165, 9696), (2424, 8660), (2598, 8080), (3030, 6928), (3232, 6495), (3464, 6060), (4040, 5196), (4330, 4848)]