21185955

素因数分解:

$3^5\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1$

素因数の和:127

約数の個数: 96

約数和(自身を含む): 45287424

約数和(自身を除く): 24101469

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 47, 53, 63, 81, 105, 135, 141, 159, 189, 235, 243, 265, 315, 329, 371, 405, 423, 477, 567, 705, 795, 945, 987, 1113, 1215, 1269, 1431, 1645, 1701, 1855, 2115, 2385, 2491, 2835, 2961, 3339, 3807, 4293, 4935, 5565, 6345, 7155, 7473, 8505, 8883, 10017, 11421, 12455, 12879, 14805, 16695, 17437, 19035, 21465, 22419, 26649, 30051, 37365, 44415, 50085, 52311, 57105, 64395, 67257, 79947, 87185, 90153, 112095, 133245, 150255, 156933, 201771, 261555, 336285, 399735, 450765, 470799, 605313, 784665, 1008855, 1412397, 2353995, 3026565, 4237191, 7061985, 21185955]

約数ペア:

[(1, 21185955), (3, 7061985), (5, 4237191), (7, 3026565), (9, 2353995), (15, 1412397), (21, 1008855), (27, 784665), (35, 605313), (45, 470799), (47, 450765), (53, 399735), (63, 336285), (81, 261555), (105, 201771), (135, 156933), (141, 150255), (159, 133245), (189, 112095), (235, 90153), (243, 87185), (265, 79947), (315, 67257), (329, 64395), (371, 57105), (405, 52311), (423, 50085), (477, 44415), (567, 37365), (705, 30051), (795, 26649), (945, 22419), (987, 21465), (1113, 19035), (1215, 17437), (1269, 16695), (1431, 14805), (1645, 12879), (1701, 12455), (1855, 11421), (2115, 10017), (2385, 8883), (2491, 8505), (2835, 7473), (2961, 7155), (3339, 6345), (3807, 5565), (4293, 4935)]