20049216980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{43}}^1\times {\mathrm{137947}}^1$

素因数の和:138025

約数の個数: 72

約数和(自身を含む): 46651806432

約数和(自身を除く): 26602589452

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 43, 52, 65, 86, 130, 169, 172, 215, 260, 338, 430, 559, 676, 845, 860, 1118, 1690, 2236, 2795, 3380, 5590, 7267, 11180, 14534, 29068, 36335, 72670, 137947, 145340, 275894, 551788, 689735, 1379470, 1793311, 2758940, 3586622, 5931721, 7173244, 8966555, 11863442, 17933110, 23313043, 23726884, 29658605, 35866220, 46626086, 59317210, 77112373, 93252172, 116565215, 118634420, 154224746, 233130430, 308449492, 385561865, 466260860, 771123730, 1002460849, 1542247460, 2004921698, 4009843396, 5012304245, 10024608490, 20049216980]

約数ペア:

[(1, 20049216980), (2, 10024608490), (4, 5012304245), (5, 4009843396), (10, 2004921698), (13, 1542247460), (20, 1002460849), (26, 771123730), (43, 466260860), (52, 385561865), (65, 308449492), (86, 233130430), (130, 154224746), (169, 118634420), (172, 116565215), (215, 93252172), (260, 77112373), (338, 59317210), (430, 46626086), (559, 35866220), (676, 29658605), (845, 23726884), (860, 23313043), (1118, 17933110), (1690, 11863442), (2236, 8966555), (2795, 7173244), (3380, 5931721), (5590, 3586622), (7267, 2758940), (11180, 1793311), (14534, 1379470), (29068, 689735), (36335, 551788), (72670, 275894), (137947, 145340)]