19800495

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{181}}^1$

素因数の和:233

約数の個数: 96

約数和(自身を含む): 42928704

約数和(自身を除く): 23128209

約数列:

[1, 3, 5, 9, 11, 13, 15, 17, 33, 39, 45, 51, 55, 65, 85, 99, 117, 143, 153, 165, 181, 187, 195, 221, 255, 429, 495, 543, 561, 585, 663, 715, 765, 905, 935, 1105, 1287, 1629, 1683, 1989, 1991, 2145, 2353, 2431, 2715, 2805, 3077, 3315, 5973, 6435, 7059, 7293, 8145, 8415, 9231, 9945, 9955, 11765, 12155, 15385, 17919, 21177, 21879, 25883, 27693, 29865, 33847, 35295, 36465, 40001, 46155, 77649, 89595, 101541, 105885, 109395, 120003, 129415, 138465, 169235, 200005, 232947, 304623, 360009, 388245, 440011, 507705, 600015, 1164735, 1320033, 1523115, 1800045, 2200055, 3960099, 6600165, 19800495]

約数ペア:

[(1, 19800495), (3, 6600165), (5, 3960099), (9, 2200055), (11, 1800045), (13, 1523115), (15, 1320033), (17, 1164735), (33, 600015), (39, 507705), (45, 440011), (51, 388245), (55, 360009), (65, 304623), (85, 232947), (99, 200005), (117, 169235), (143, 138465), (153, 129415), (165, 120003), (181, 109395), (187, 105885), (195, 101541), (221, 89595), (255, 77649), (429, 46155), (495, 40001), (543, 36465), (561, 35295), (585, 33847), (663, 29865), (715, 27693), (765, 25883), (905, 21879), (935, 21177), (1105, 17919), (1287, 15385), (1629, 12155), (1683, 11765), (1989, 9955), (1991, 9945), (2145, 9231), (2353, 8415), (2431, 8145), (2715, 7293), (2805, 7059), (3077, 6435), (3315, 5973)]