28939071

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{61}}^1$

素因数の和:160

約数の個数: 64

約数和(自身を含む): 49996800

約数和(自身を除く): 21057729

約数列:

[1, 3, 7, 19, 21, 29, 41, 57, 61, 87, 123, 133, 183, 203, 287, 399, 427, 551, 609, 779, 861, 1159, 1189, 1281, 1653, 1769, 2337, 2501, 3477, 3567, 3857, 5307, 5453, 7503, 8113, 8323, 11571, 12383, 16359, 17507, 22591, 24339, 24969, 33611, 37149, 47519, 52521, 67773, 72529, 100833, 142557, 158137, 217587, 235277, 332633, 474411, 507703, 705831, 997899, 1378051, 1523109, 4134153, 9646357, 28939071]

約数ペア:

[(1, 28939071), (3, 9646357), (7, 4134153), (19, 1523109), (21, 1378051), (29, 997899), (41, 705831), (57, 507703), (61, 474411), (87, 332633), (123, 235277), (133, 217587), (183, 158137), (203, 142557), (287, 100833), (399, 72529), (427, 67773), (551, 52521), (609, 47519), (779, 37149), (861, 33611), (1159, 24969), (1189, 24339), (1281, 22591), (1653, 17507), (1769, 16359), (2337, 12383), (2501, 11571), (3477, 8323), (3567, 8113), (3857, 7503), (5307, 5453)]