21789440

素因数分解:

$2^8\times 5^1\times {\mathrm{29}}^1\times {\mathrm{587}}^1$

素因数の和:637

約数の個数: 72

約数和(自身を含む): 54084240

約数和(自身を除く): 32294800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 32, 40, 58, 64, 80, 116, 128, 145, 160, 232, 256, 290, 320, 464, 580, 587, 640, 928, 1160, 1174, 1280, 1856, 2320, 2348, 2935, 3712, 4640, 4696, 5870, 7424, 9280, 9392, 11740, 17023, 18560, 18784, 23480, 34046, 37120, 37568, 46960, 68092, 75136, 85115, 93920, 136184, 150272, 170230, 187840, 272368, 340460, 375680, 544736, 680920, 751360, 1089472, 1361840, 2178944, 2723680, 4357888, 5447360, 10894720, 21789440]

約数ペア:

[(1, 21789440), (2, 10894720), (4, 5447360), (5, 4357888), (8, 2723680), (10, 2178944), (16, 1361840), (20, 1089472), (29, 751360), (32, 680920), (40, 544736), (58, 375680), (64, 340460), (80, 272368), (116, 187840), (128, 170230), (145, 150272), (160, 136184), (232, 93920), (256, 85115), (290, 75136), (320, 68092), (464, 46960), (580, 37568), (587, 37120), (640, 34046), (928, 23480), (1160, 18784), (1174, 18560), (1280, 17023), (1856, 11740), (2320, 9392), (2348, 9280), (2935, 7424), (3712, 5870), (4640, 4696)]