20690955

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^2\times {\mathrm{37}}^1\times {\mathrm{43}}^1$

素因数の和:125

約数の個数: 72

約数和(自身を含む): 40037712

約数和(自身を除く): 19346757

約数列:

[1, 3, 5, 9, 15, 17, 37, 43, 45, 51, 85, 111, 129, 153, 185, 215, 255, 289, 333, 387, 555, 629, 645, 731, 765, 867, 1445, 1591, 1665, 1887, 1935, 2193, 2601, 3145, 3655, 4335, 4773, 5661, 6579, 7955, 9435, 10693, 10965, 12427, 13005, 14319, 23865, 27047, 28305, 32079, 32895, 37281, 53465, 62135, 71595, 81141, 96237, 111843, 135235, 160395, 186405, 243423, 405705, 459799, 481185, 559215, 1217115, 1379397, 2298995, 4138191, 6896985, 20690955]

約数ペア:

[(1, 20690955), (3, 6896985), (5, 4138191), (9, 2298995), (15, 1379397), (17, 1217115), (37, 559215), (43, 481185), (45, 459799), (51, 405705), (85, 243423), (111, 186405), (129, 160395), (153, 135235), (185, 111843), (215, 96237), (255, 81141), (289, 71595), (333, 62135), (387, 53465), (555, 37281), (629, 32895), (645, 32079), (731, 28305), (765, 27047), (867, 23865), (1445, 14319), (1591, 13005), (1665, 12427), (1887, 10965), (1935, 10693), (2193, 9435), (2601, 7955), (3145, 6579), (3655, 5661), (4335, 4773)]