20808897831

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{197}}^1\times {\mathrm{557}}^1\times {\mathrm{1109}}^1$

素因数の和:1888

約数の個数: 48

約数和(自身を含む): 31885682400

約数和(自身を除く): 11076784569

約数列:

[1, 3, 9, 19, 57, 171, 197, 557, 591, 1109, 1671, 1773, 3327, 3743, 5013, 9981, 10583, 11229, 21071, 31749, 33687, 63213, 95247, 109729, 189639, 218473, 329187, 617713, 655419, 987561, 1853139, 1966257, 2084851, 4150987, 5559417, 6254553, 11736547, 12452961, 18763659, 35209641, 37358883, 105628923, 121689461, 365068383, 1095205149, 2312099759, 6936299277, 20808897831]

約数ペア:

[(1, 20808897831), (3, 6936299277), (9, 2312099759), (19, 1095205149), (57, 365068383), (171, 121689461), (197, 105628923), (557, 37358883), (591, 35209641), (1109, 18763659), (1671, 12452961), (1773, 11736547), (3327, 6254553), (3743, 5559417), (5013, 4150987), (9981, 2084851), (10583, 1966257), (11229, 1853139), (21071, 987561), (31749, 655419), (33687, 617713), (63213, 329187), (95247, 218473), (109729, 189639)]