20999568

素因数分解:

$2^4\times 3^1\times {\mathrm{401}}^1\times {\mathrm{1091}}^1$

素因数の和:1503

約数の個数: 40

約数和(自身を含む): 54434016

約数和(自身を除く): 33434448

約数列:

[1, 2, 3, 4, 6, 8, 12, 16, 24, 48, 401, 802, 1091, 1203, 1604, 2182, 2406, 3208, 3273, 4364, 4812, 6416, 6546, 8728, 9624, 13092, 17456, 19248, 26184, 52368, 437491, 874982, 1312473, 1749964, 2624946, 3499928, 5249892, 6999856, 10499784, 20999568]

約数ペア:

[(1, 20999568), (2, 10499784), (3, 6999856), (4, 5249892), (6, 3499928), (8, 2624946), (12, 1749964), (16, 1312473), (24, 874982), (48, 437491), (401, 52368), (802, 26184), (1091, 19248), (1203, 17456), (1604, 13092), (2182, 9624), (2406, 8728), (3208, 6546), (3273, 6416), (4364, 4812)]