19997588

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{149}}^1$

素因数の和:284

約数の個数: 48

約数和(自身を含む): 39690000

約数和(自身を除く): 19692412

約数列:

[1, 2, 4, 13, 26, 29, 52, 58, 89, 116, 149, 178, 298, 356, 377, 596, 754, 1157, 1508, 1937, 2314, 2581, 3874, 4321, 4628, 5162, 7748, 8642, 10324, 13261, 17284, 26522, 33553, 53044, 56173, 67106, 112346, 134212, 172393, 224692, 344786, 384569, 689572, 769138, 1538276, 4999397, 9998794, 19997588]

約数ペア:

[(1, 19997588), (2, 9998794), (4, 4999397), (13, 1538276), (26, 769138), (29, 689572), (52, 384569), (58, 344786), (89, 224692), (116, 172393), (149, 134212), (178, 112346), (298, 67106), (356, 56173), (377, 53044), (596, 33553), (754, 26522), (1157, 17284), (1508, 13261), (1937, 10324), (2314, 8642), (2581, 7748), (3874, 5162), (4321, 4628)]