21384165

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{109}}^1$

素因数の和:198

約数の個数: 64

約数和(自身を含む): 39916800

約数和(自身を除く): 18532635

約数列:

[1, 3, 5, 11, 15, 29, 33, 41, 55, 87, 109, 123, 145, 165, 205, 319, 327, 435, 451, 545, 615, 957, 1189, 1199, 1353, 1595, 1635, 2255, 3161, 3567, 3597, 4469, 4785, 5945, 5995, 6765, 9483, 13079, 13407, 15805, 17835, 17985, 22345, 34771, 39237, 47415, 49159, 65395, 67035, 104313, 129601, 147477, 173855, 196185, 245795, 388803, 521565, 648005, 737385, 1425611, 1944015, 4276833, 7128055, 21384165]

約数ペア:

[(1, 21384165), (3, 7128055), (5, 4276833), (11, 1944015), (15, 1425611), (29, 737385), (33, 648005), (41, 521565), (55, 388803), (87, 245795), (109, 196185), (123, 173855), (145, 147477), (165, 129601), (205, 104313), (319, 67035), (327, 65395), (435, 49159), (451, 47415), (545, 39237), (615, 34771), (957, 22345), (1189, 17985), (1199, 17835), (1353, 15805), (1595, 13407), (1635, 13079), (2255, 9483), (3161, 6765), (3567, 5995), (3597, 5945), (4469, 4785)]