20371840

素因数分解:

$2^7\times 5^1\times {\mathrm{139}}^1\times {\mathrm{229}}^1$

素因数の和:387

約数の個数: 64

約数和(自身を含む): 49266000

約数和(自身を除く): 28894160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 139, 160, 229, 278, 320, 458, 556, 640, 695, 916, 1112, 1145, 1390, 1832, 2224, 2290, 2780, 3664, 4448, 4580, 5560, 7328, 8896, 9160, 11120, 14656, 17792, 18320, 22240, 29312, 31831, 36640, 44480, 63662, 73280, 88960, 127324, 146560, 159155, 254648, 318310, 509296, 636620, 1018592, 1273240, 2037184, 2546480, 4074368, 5092960, 10185920, 20371840]

約数ペア:

[(1, 20371840), (2, 10185920), (4, 5092960), (5, 4074368), (8, 2546480), (10, 2037184), (16, 1273240), (20, 1018592), (32, 636620), (40, 509296), (64, 318310), (80, 254648), (128, 159155), (139, 146560), (160, 127324), (229, 88960), (278, 73280), (320, 63662), (458, 44480), (556, 36640), (640, 31831), (695, 29312), (916, 22240), (1112, 18320), (1145, 17792), (1390, 14656), (1832, 11120), (2224, 9160), (2290, 8896), (2780, 7328), (3664, 5560), (4448, 4580)]