19813755

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{139}}^1$

素因数の和:220

約数の個数: 64

約数和(自身を含む): 37255680

約数和(自身を除く): 17441925

約数列:

[1, 3, 5, 13, 15, 17, 39, 43, 51, 65, 85, 129, 139, 195, 215, 221, 255, 417, 559, 645, 663, 695, 731, 1105, 1677, 1807, 2085, 2193, 2363, 2795, 3315, 3655, 5421, 5977, 7089, 8385, 9035, 9503, 10965, 11815, 17931, 27105, 28509, 29885, 30719, 35445, 47515, 77701, 89655, 92157, 101609, 142545, 153595, 233103, 304827, 388505, 460785, 508045, 1165515, 1320917, 1524135, 3962751, 6604585, 19813755]

約数ペア:

[(1, 19813755), (3, 6604585), (5, 3962751), (13, 1524135), (15, 1320917), (17, 1165515), (39, 508045), (43, 460785), (51, 388505), (65, 304827), (85, 233103), (129, 153595), (139, 142545), (195, 101609), (215, 92157), (221, 89655), (255, 77701), (417, 47515), (559, 35445), (645, 30719), (663, 29885), (695, 28509), (731, 27105), (1105, 17931), (1677, 11815), (1807, 10965), (2085, 9503), (2193, 9035), (2363, 8385), (2795, 7089), (3315, 5977), (3655, 5421)]