19504940

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{1531}}^1$

素因数の和:1567

約数の個数: 72

約数和(自身を含む): 51346512

約数和(自身を除く): 31841572

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 49, 52, 65, 70, 91, 98, 130, 140, 182, 196, 245, 260, 364, 455, 490, 637, 910, 980, 1274, 1531, 1820, 2548, 3062, 3185, 6124, 6370, 7655, 10717, 12740, 15310, 19903, 21434, 30620, 39806, 42868, 53585, 75019, 79612, 99515, 107170, 139321, 150038, 199030, 214340, 278642, 300076, 375095, 398060, 557284, 696605, 750190, 975247, 1393210, 1500380, 1950494, 2786420, 3900988, 4876235, 9752470, 19504940]

約数ペア:

[(1, 19504940), (2, 9752470), (4, 4876235), (5, 3900988), (7, 2786420), (10, 1950494), (13, 1500380), (14, 1393210), (20, 975247), (26, 750190), (28, 696605), (35, 557284), (49, 398060), (52, 375095), (65, 300076), (70, 278642), (91, 214340), (98, 199030), (130, 150038), (140, 139321), (182, 107170), (196, 99515), (245, 79612), (260, 75019), (364, 53585), (455, 42868), (490, 39806), (637, 30620), (910, 21434), (980, 19903), (1274, 15310), (1531, 12740), (1820, 10717), (2548, 7655), (3062, 6370), (3185, 6124)]