21285964

素因数分解:

$2^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{137}}^1\times {\mathrm{179}}^1$

素因数の和:358

約数の個数: 48

約数和(自身を含む): 44513280

約数和(自身を除く): 23227316

約数列:

[1, 2, 4, 7, 14, 28, 31, 62, 124, 137, 179, 217, 274, 358, 434, 548, 716, 868, 959, 1253, 1918, 2506, 3836, 4247, 5012, 5549, 8494, 11098, 16988, 22196, 24523, 29729, 38843, 49046, 59458, 77686, 98092, 118916, 155372, 171661, 343322, 686644, 760213, 1520426, 3040852, 5321491, 10642982, 21285964]

約数ペア:

[(1, 21285964), (2, 10642982), (4, 5321491), (7, 3040852), (14, 1520426), (28, 760213), (31, 686644), (62, 343322), (124, 171661), (137, 155372), (179, 118916), (217, 98092), (274, 77686), (358, 59458), (434, 49046), (548, 38843), (716, 29729), (868, 24523), (959, 22196), (1253, 16988), (1918, 11098), (2506, 8494), (3836, 5549), (4247, 5012)]