20105895

素因数分解:

$3^1\times 5^1\times {\mathrm{19}}^2\times {\mathrm{47}}^1\times {\mathrm{79}}^1$

素因数の和:172

約数の個数: 48

約数和(自身を含む): 35112960

約数和(自身を除く): 15007065

約数列:

[1, 3, 5, 15, 19, 47, 57, 79, 95, 141, 235, 237, 285, 361, 395, 705, 893, 1083, 1185, 1501, 1805, 2679, 3713, 4465, 4503, 5415, 7505, 11139, 13395, 16967, 18565, 22515, 28519, 50901, 55695, 70547, 84835, 85557, 142595, 211641, 254505, 352735, 427785, 1058205, 1340393, 4021179, 6701965, 20105895]

約数ペア:

[(1, 20105895), (3, 6701965), (5, 4021179), (15, 1340393), (19, 1058205), (47, 427785), (57, 352735), (79, 254505), (95, 211641), (141, 142595), (235, 85557), (237, 84835), (285, 70547), (361, 55695), (395, 50901), (705, 28519), (893, 22515), (1083, 18565), (1185, 16967), (1501, 13395), (1805, 11139), (2679, 7505), (3713, 5415), (4465, 4503)]