28987420

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{2689}}^1$

素因数の和:2723

約数の個数: 72

約数和(自身を含む): 77278320

約数和(自身を除く): 48290900

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 49, 55, 70, 77, 98, 110, 140, 154, 196, 220, 245, 308, 385, 490, 539, 770, 980, 1078, 1540, 2156, 2689, 2695, 5378, 5390, 10756, 10780, 13445, 18823, 26890, 29579, 37646, 53780, 59158, 75292, 94115, 118316, 131761, 147895, 188230, 207053, 263522, 295790, 376460, 414106, 527044, 591580, 658805, 828212, 1035265, 1317610, 1449371, 2070530, 2635220, 2898742, 4141060, 5797484, 7246855, 14493710, 28987420]

約数ペア:

[(1, 28987420), (2, 14493710), (4, 7246855), (5, 5797484), (7, 4141060), (10, 2898742), (11, 2635220), (14, 2070530), (20, 1449371), (22, 1317610), (28, 1035265), (35, 828212), (44, 658805), (49, 591580), (55, 527044), (70, 414106), (77, 376460), (98, 295790), (110, 263522), (140, 207053), (154, 188230), (196, 147895), (220, 131761), (245, 118316), (308, 94115), (385, 75292), (490, 59158), (539, 53780), (770, 37646), (980, 29579), (1078, 26890), (1540, 18823), (2156, 13445), (2689, 10780), (2695, 10756), (5378, 5390)]