21197925

素因数分解:

$3^2\times 5^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{313}}^1$

素因数の和:379

約数の個数: 72

約数和(自身を含む): 44542784

約数和(自身を除く): 23344859

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 35, 43, 45, 63, 75, 105, 129, 175, 215, 225, 301, 313, 315, 387, 525, 645, 903, 939, 1075, 1505, 1565, 1575, 1935, 2191, 2709, 2817, 3225, 4515, 4695, 6573, 7525, 7825, 9675, 10955, 13459, 13545, 14085, 19719, 22575, 23475, 32865, 40377, 54775, 67295, 67725, 70425, 94213, 98595, 121131, 164325, 201885, 282639, 336475, 471065, 492975, 605655, 847917, 1009425, 1413195, 2355325, 3028275, 4239585, 7065975, 21197925]

約数ペア:

[(1, 21197925), (3, 7065975), (5, 4239585), (7, 3028275), (9, 2355325), (15, 1413195), (21, 1009425), (25, 847917), (35, 605655), (43, 492975), (45, 471065), (63, 336475), (75, 282639), (105, 201885), (129, 164325), (175, 121131), (215, 98595), (225, 94213), (301, 70425), (313, 67725), (315, 67295), (387, 54775), (525, 40377), (645, 32865), (903, 23475), (939, 22575), (1075, 19719), (1505, 14085), (1565, 13545), (1575, 13459), (1935, 10955), (2191, 9675), (2709, 7825), (2817, 7525), (3225, 6573), (4515, 4695)]