21144915

素因数分解:

$3^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{491}}^1$

素因数の和:545

約数の個数: 64

約数和(自身を含む): 42508800

約数和(自身を除く): 21363885

約数列:

[1, 3, 5, 9, 11, 15, 27, 29, 33, 45, 55, 87, 99, 135, 145, 165, 261, 297, 319, 435, 491, 495, 783, 957, 1305, 1473, 1485, 1595, 2455, 2871, 3915, 4419, 4785, 5401, 7365, 8613, 13257, 14239, 14355, 16203, 22095, 27005, 42717, 43065, 48609, 66285, 71195, 81015, 128151, 145827, 156629, 213585, 243045, 384453, 469887, 640755, 729135, 783145, 1409661, 1922265, 2349435, 4228983, 7048305, 21144915]

約数ペア:

[(1, 21144915), (3, 7048305), (5, 4228983), (9, 2349435), (11, 1922265), (15, 1409661), (27, 783145), (29, 729135), (33, 640755), (45, 469887), (55, 384453), (87, 243045), (99, 213585), (135, 156629), (145, 145827), (165, 128151), (261, 81015), (297, 71195), (319, 66285), (435, 48609), (491, 43065), (495, 42717), (783, 27005), (957, 22095), (1305, 16203), (1473, 14355), (1485, 14239), (1595, 13257), (2455, 8613), (2871, 7365), (3915, 5401), (4419, 4785)]