20912290

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{419}}^1$

素因数の和:487

約数の個数: 64

約数和(自身を含む): 46448640

約数和(自身を除く): 25536350

約数列:

[1, 2, 5, 7, 10, 14, 23, 31, 35, 46, 62, 70, 115, 155, 161, 217, 230, 310, 322, 419, 434, 713, 805, 838, 1085, 1426, 1610, 2095, 2170, 2933, 3565, 4190, 4991, 5866, 7130, 9637, 9982, 12989, 14665, 19274, 24955, 25978, 29330, 48185, 49910, 64945, 67459, 90923, 96370, 129890, 134918, 181846, 298747, 337295, 454615, 597494, 674590, 909230, 1493735, 2091229, 2987470, 4182458, 10456145, 20912290]

約数ペア:

[(1, 20912290), (2, 10456145), (5, 4182458), (7, 2987470), (10, 2091229), (14, 1493735), (23, 909230), (31, 674590), (35, 597494), (46, 454615), (62, 337295), (70, 298747), (115, 181846), (155, 134918), (161, 129890), (217, 96370), (230, 90923), (310, 67459), (322, 64945), (419, 49910), (434, 48185), (713, 29330), (805, 25978), (838, 24955), (1085, 19274), (1426, 14665), (1610, 12989), (2095, 9982), (2170, 9637), (2933, 7130), (3565, 5866), (4190, 4991)]