19858972

素因数分解:

$2^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{137}}^1\times {\mathrm{167}}^1$

素因数の和:346

約数の個数: 48

約数和(自身を含む): 41545728

約数和(自身を除く): 21686756

約数列:

[1, 2, 4, 7, 14, 28, 31, 62, 124, 137, 167, 217, 274, 334, 434, 548, 668, 868, 959, 1169, 1918, 2338, 3836, 4247, 4676, 5177, 8494, 10354, 16988, 20708, 22879, 29729, 36239, 45758, 59458, 72478, 91516, 118916, 144956, 160153, 320306, 640612, 709249, 1418498, 2836996, 4964743, 9929486, 19858972]

約数ペア:

[(1, 19858972), (2, 9929486), (4, 4964743), (7, 2836996), (14, 1418498), (28, 709249), (31, 640612), (62, 320306), (124, 160153), (137, 144956), (167, 118916), (217, 91516), (274, 72478), (334, 59458), (434, 45758), (548, 36239), (668, 29729), (868, 22879), (959, 20708), (1169, 16988), (1918, 10354), (2338, 8494), (3836, 5177), (4247, 4676)]