21237280

素因数分解:

$2^5\times 5^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{199}}^1$

素因数の和:266

約数の個数: 96

約数和(自身を含む): 54432000

約数和(自身を除く): 33194720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 29, 32, 40, 46, 58, 80, 92, 115, 116, 145, 160, 184, 199, 230, 232, 290, 368, 398, 460, 464, 580, 667, 736, 796, 920, 928, 995, 1160, 1334, 1592, 1840, 1990, 2320, 2668, 3184, 3335, 3680, 3980, 4577, 4640, 5336, 5771, 6368, 6670, 7960, 9154, 10672, 11542, 13340, 15920, 18308, 21344, 22885, 23084, 26680, 28855, 31840, 36616, 45770, 46168, 53360, 57710, 73232, 91540, 92336, 106720, 115420, 132733, 146464, 183080, 184672, 230840, 265466, 366160, 461680, 530932, 663665, 732320, 923360, 1061864, 1327330, 2123728, 2654660, 4247456, 5309320, 10618640, 21237280]

約数ペア:

[(1, 21237280), (2, 10618640), (4, 5309320), (5, 4247456), (8, 2654660), (10, 2123728), (16, 1327330), (20, 1061864), (23, 923360), (29, 732320), (32, 663665), (40, 530932), (46, 461680), (58, 366160), (80, 265466), (92, 230840), (115, 184672), (116, 183080), (145, 146464), (160, 132733), (184, 115420), (199, 106720), (230, 92336), (232, 91540), (290, 73232), (368, 57710), (398, 53360), (460, 46168), (464, 45770), (580, 36616), (667, 31840), (736, 28855), (796, 26680), (920, 23084), (928, 22885), (995, 21344), (1160, 18308), (1334, 15920), (1592, 13340), (1840, 11542), (1990, 10672), (2320, 9154), (2668, 7960), (3184, 6670), (3335, 6368), (3680, 5771), (3980, 5336), (4577, 4640)]