28156920920

素因数分解:

$2^3\times 5^1\times {\mathrm{1811}}^1\times {\mathrm{388693}}^1$

素因数の和:390515

約数の個数: 32

約数和(自身を含む): 63388217520

約数和(自身を除く): 35231296600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1811, 3622, 7244, 9055, 14488, 18110, 36220, 72440, 388693, 777386, 1554772, 1943465, 3109544, 3886930, 7773860, 15547720, 703923023, 1407846046, 2815692092, 3519615115, 5631384184, 7039230230, 14078460460, 28156920920]

約数ペア:

[(1, 28156920920), (2, 14078460460), (4, 7039230230), (5, 5631384184), (8, 3519615115), (10, 2815692092), (20, 1407846046), (40, 703923023), (1811, 15547720), (3622, 7773860), (7244, 3886930), (9055, 3109544), (14488, 1943465), (18110, 1554772), (36220, 777386), (72440, 388693)]