21208908

素因数分解:

$2^2\times 3^1\times 7^1\times {\mathrm{163}}^1\times {\mathrm{1549}}^1$

素因数の和:1726

約数の個数: 48

約数和(自身を含む): 56940800

約数和(自身を除く): 35731892

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84, 163, 326, 489, 652, 978, 1141, 1549, 1956, 2282, 3098, 3423, 4564, 4647, 6196, 6846, 9294, 10843, 13692, 18588, 21686, 32529, 43372, 65058, 130116, 252487, 504974, 757461, 1009948, 1514922, 1767409, 3029844, 3534818, 5302227, 7069636, 10604454, 21208908]

約数ペア:

[(1, 21208908), (2, 10604454), (3, 7069636), (4, 5302227), (6, 3534818), (7, 3029844), (12, 1767409), (14, 1514922), (21, 1009948), (28, 757461), (42, 504974), (84, 252487), (163, 130116), (326, 65058), (489, 43372), (652, 32529), (978, 21686), (1141, 18588), (1549, 13692), (1956, 10843), (2282, 9294), (3098, 6846), (3423, 6196), (4564, 4647)]