21000798724

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{311}}^1\times {\mathrm{20663}}^1$

素因数の和:21040

約数の個数: 48

約数和(自身を含む): 39714554880

約数和(自身を除く): 18713756156

約数列:

[1, 2, 4, 19, 38, 43, 76, 86, 172, 311, 622, 817, 1244, 1634, 3268, 5909, 11818, 13373, 20663, 23636, 26746, 41326, 53492, 82652, 254087, 392597, 508174, 785194, 888509, 1016348, 1570388, 1777018, 3554036, 6426193, 12852386, 16881671, 25704772, 33763342, 67526684, 122097667, 244195334, 276326299, 488390668, 552652598, 1105305196, 5250199681, 10500399362, 21000798724]

約数ペア:

[(1, 21000798724), (2, 10500399362), (4, 5250199681), (19, 1105305196), (38, 552652598), (43, 488390668), (76, 276326299), (86, 244195334), (172, 122097667), (311, 67526684), (622, 33763342), (817, 25704772), (1244, 16881671), (1634, 12852386), (3268, 6426193), (5909, 3554036), (11818, 1777018), (13373, 1570388), (20663, 1016348), (23636, 888509), (26746, 785194), (41326, 508174), (53492, 392597), (82652, 254087)]