21304995

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{67}}^1$

素因数の和:164

約数の個数: 64

約数和(自身を含む): 38776320

約数和(自身を除く): 17471325

約数列:

[1, 3, 5, 15, 17, 29, 43, 51, 67, 85, 87, 129, 145, 201, 215, 255, 335, 435, 493, 645, 731, 1005, 1139, 1247, 1479, 1943, 2193, 2465, 2881, 3417, 3655, 3741, 5695, 5829, 6235, 7395, 8643, 9715, 10965, 14405, 17085, 18705, 21199, 29145, 33031, 43215, 48977, 63597, 83549, 99093, 105995, 146931, 165155, 244885, 250647, 317985, 417745, 495465, 734655, 1253235, 1420333, 4260999, 7101665, 21304995]

約数ペア:

[(1, 21304995), (3, 7101665), (5, 4260999), (15, 1420333), (17, 1253235), (29, 734655), (43, 495465), (51, 417745), (67, 317985), (85, 250647), (87, 244885), (129, 165155), (145, 146931), (201, 105995), (215, 99093), (255, 83549), (335, 63597), (435, 48977), (493, 43215), (645, 33031), (731, 29145), (1005, 21199), (1139, 18705), (1247, 17085), (1479, 14405), (1943, 10965), (2193, 9715), (2465, 8643), (2881, 7395), (3417, 6235), (3655, 5829), (3741, 5695)]