1640386720

素因数分解:

$2^5\times 5^1\times 7^2\times {\mathrm{209233}}^1$

素因数の和:209262

約数の個数: 72

約数和(自身を含む): 4508155764

約数和(自身を除く): 2867769044

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 49, 56, 70, 80, 98, 112, 140, 160, 196, 224, 245, 280, 392, 490, 560, 784, 980, 1120, 1568, 1960, 3920, 7840, 209233, 418466, 836932, 1046165, 1464631, 1673864, 2092330, 2929262, 3347728, 4184660, 5858524, 6695456, 7323155, 8369320, 10252417, 11717048, 14646310, 16738640, 20504834, 23434096, 29292620, 33477280, 41009668, 46868192, 51262085, 58585240, 82019336, 102524170, 117170480, 164038672, 205048340, 234340960, 328077344, 410096680, 820193360, 1640386720]

約数ペア:

[(1, 1640386720), (2, 820193360), (4, 410096680), (5, 328077344), (7, 234340960), (8, 205048340), (10, 164038672), (14, 117170480), (16, 102524170), (20, 82019336), (28, 58585240), (32, 51262085), (35, 46868192), (40, 41009668), (49, 33477280), (56, 29292620), (70, 23434096), (80, 20504834), (98, 16738640), (112, 14646310), (140, 11717048), (160, 10252417), (196, 8369320), (224, 7323155), (245, 6695456), (280, 5858524), (392, 4184660), (490, 3347728), (560, 2929262), (784, 2092330), (980, 1673864), (1120, 1464631), (1568, 1046165), (1960, 836932), (3920, 418466), (7840, 209233)]