77820140

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{227}}^1\times {\mathrm{281}}^1$

素因数の和:578

約数の個数: 48

約数和(自身を含む): 167426784

約数和(自身を除く): 89606644

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 227, 244, 281, 305, 454, 562, 610, 908, 1124, 1135, 1220, 1405, 2270, 2810, 4540, 5620, 13847, 17141, 27694, 34282, 55388, 63787, 68564, 69235, 85705, 127574, 138470, 171410, 255148, 276940, 318935, 342820, 637870, 1275740, 3891007, 7782014, 15564028, 19455035, 38910070, 77820140]

約数ペア:

[(1, 77820140), (2, 38910070), (4, 19455035), (5, 15564028), (10, 7782014), (20, 3891007), (61, 1275740), (122, 637870), (227, 342820), (244, 318935), (281, 276940), (305, 255148), (454, 171410), (562, 138470), (610, 127574), (908, 85705), (1124, 69235), (1135, 68564), (1220, 63787), (1405, 55388), (2270, 34282), (2810, 27694), (4540, 17141), (5620, 13847)]