20639836

素因数分解:

$2^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{131}}^1\times {\mathrm{331}}^1$

素因数の和:490

約数の個数: 48

約数和(自身を含む): 44174592

約数和(自身を除く): 23534756

約数列:

[1, 2, 4, 7, 14, 17, 28, 34, 68, 119, 131, 238, 262, 331, 476, 524, 662, 917, 1324, 1834, 2227, 2317, 3668, 4454, 4634, 5627, 8908, 9268, 11254, 15589, 22508, 31178, 39389, 43361, 62356, 78778, 86722, 157556, 173444, 303527, 607054, 737137, 1214108, 1474274, 2948548, 5159959, 10319918, 20639836]

約数ペア:

[(1, 20639836), (2, 10319918), (4, 5159959), (7, 2948548), (14, 1474274), (17, 1214108), (28, 737137), (34, 607054), (68, 303527), (119, 173444), (131, 157556), (238, 86722), (262, 78778), (331, 62356), (476, 43361), (524, 39389), (662, 31178), (917, 22508), (1324, 15589), (1834, 11254), (2227, 9268), (2317, 8908), (3668, 5627), (4454, 4634)]