20121974915

素因数分解:

$5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{331}}^1\times {\mathrm{1303}}^1$

素因数の和:1720

約数の個数: 64

約数和(自身を含む): 29259005952

約数和(自身を除く): 9137031037

約数列:

[1, 5, 7, 31, 35, 43, 155, 215, 217, 301, 331, 1085, 1303, 1333, 1505, 1655, 2317, 6515, 6665, 9121, 9331, 10261, 11585, 14233, 40393, 45605, 46655, 51305, 56029, 71165, 71827, 99631, 201965, 280145, 282751, 359135, 392203, 431293, 441223, 498155, 1413755, 1736899, 1961015, 2156465, 2206115, 3019051, 3088561, 8684495, 12158293, 13370083, 15095255, 15442805, 18545599, 60791465, 66850415, 92727995, 93590581, 129819193, 467952905, 574913569, 649095965, 2874567845, 4024394983, 20121974915]

約数ペア:

[(1, 20121974915), (5, 4024394983), (7, 2874567845), (31, 649095965), (35, 574913569), (43, 467952905), (155, 129819193), (215, 93590581), (217, 92727995), (301, 66850415), (331, 60791465), (1085, 18545599), (1303, 15442805), (1333, 15095255), (1505, 13370083), (1655, 12158293), (2317, 8684495), (6515, 3088561), (6665, 3019051), (9121, 2206115), (9331, 2156465), (10261, 1961015), (11585, 1736899), (14233, 1413755), (40393, 498155), (45605, 441223), (46655, 431293), (51305, 392203), (56029, 359135), (71165, 282751), (71827, 280145), (99631, 201965)]