640979440

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{421697}}^1$

素因数の和:421729

約数の個数: 40

約数和(自身を含む): 1568716560

約数和(自身を除く): 927737120

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 421697, 843394, 1686788, 2108485, 3373576, 4216970, 6747152, 8012243, 8433940, 16024486, 16867880, 32048972, 33735760, 40061215, 64097944, 80122430, 128195888, 160244860, 320489720, 640979440]

約数ペア:

[(1, 640979440), (2, 320489720), (4, 160244860), (5, 128195888), (8, 80122430), (10, 64097944), (16, 40061215), (19, 33735760), (20, 32048972), (38, 16867880), (40, 16024486), (76, 8433940), (80, 8012243), (95, 6747152), (152, 4216970), (190, 3373576), (304, 2108485), (380, 1686788), (760, 843394), (1520, 421697)]