2781984640

素因数分解:

$2^7\times 5^1\times {\mathrm{31}}^1\times {\mathrm{140221}}^1$

素因数の和:140271

約数の個数: 64

約数和(自身を含む): 6865269120

約数和(自身を除く): 4083284480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 155, 160, 248, 310, 320, 496, 620, 640, 992, 1240, 1984, 2480, 3968, 4960, 9920, 19840, 140221, 280442, 560884, 701105, 1121768, 1402210, 2243536, 2804420, 4346851, 4487072, 5608840, 8693702, 8974144, 11217680, 17387404, 17948288, 21734255, 22435360, 34774808, 43468510, 44870720, 69549616, 86937020, 89741440, 139099232, 173874040, 278198464, 347748080, 556396928, 695496160, 1390992320, 2781984640]

約数ペア:

[(1, 2781984640), (2, 1390992320), (4, 695496160), (5, 556396928), (8, 347748080), (10, 278198464), (16, 173874040), (20, 139099232), (31, 89741440), (32, 86937020), (40, 69549616), (62, 44870720), (64, 43468510), (80, 34774808), (124, 22435360), (128, 21734255), (155, 17948288), (160, 17387404), (248, 11217680), (310, 8974144), (320, 8693702), (496, 5608840), (620, 4487072), (640, 4346851), (992, 2804420), (1240, 2243536), (1984, 1402210), (2480, 1121768), (3968, 701105), (4960, 560884), (9920, 280442), (19840, 140221)]