18728080

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{631}}^1$

素因数の和:704

約数の個数: 80

約数和(自身を含む): 50782464

約数和(自身を除く): 32054384

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 53, 56, 70, 80, 106, 112, 140, 212, 265, 280, 371, 424, 530, 560, 631, 742, 848, 1060, 1262, 1484, 1855, 2120, 2524, 2968, 3155, 3710, 4240, 4417, 5048, 5936, 6310, 7420, 8834, 10096, 12620, 14840, 17668, 22085, 25240, 29680, 33443, 35336, 44170, 50480, 66886, 70672, 88340, 133772, 167215, 176680, 234101, 267544, 334430, 353360, 468202, 535088, 668860, 936404, 1170505, 1337720, 1872808, 2341010, 2675440, 3745616, 4682020, 9364040, 18728080]

約数ペア:

[(1, 18728080), (2, 9364040), (4, 4682020), (5, 3745616), (7, 2675440), (8, 2341010), (10, 1872808), (14, 1337720), (16, 1170505), (20, 936404), (28, 668860), (35, 535088), (40, 468202), (53, 353360), (56, 334430), (70, 267544), (80, 234101), (106, 176680), (112, 167215), (140, 133772), (212, 88340), (265, 70672), (280, 66886), (371, 50480), (424, 44170), (530, 35336), (560, 33443), (631, 29680), (742, 25240), (848, 22085), (1060, 17668), (1262, 14840), (1484, 12620), (1855, 10096), (2120, 8834), (2524, 7420), (2968, 6310), (3155, 5936), (3710, 5048), (4240, 4417)]