18880528

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{173}}^1\times {\mathrm{359}}^1$

素因数の和:559

約数の個数: 40

約数和(自身を含む): 38836800

約数和(自身を除く): 19956272

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 173, 304, 346, 359, 692, 718, 1384, 1436, 2768, 2872, 3287, 5744, 6574, 6821, 13148, 13642, 26296, 27284, 52592, 54568, 62107, 109136, 124214, 248428, 496856, 993712, 1180033, 2360066, 4720132, 9440264, 18880528]

約数ペア:

[(1, 18880528), (2, 9440264), (4, 4720132), (8, 2360066), (16, 1180033), (19, 993712), (38, 496856), (76, 248428), (152, 124214), (173, 109136), (304, 62107), (346, 54568), (359, 52592), (692, 27284), (718, 26296), (1384, 13642), (1436, 13148), (2768, 6821), (2872, 6574), (3287, 5744)]