21000304876

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{29}}^2\times {\mathrm{79}}^1\times {\mathrm{4159}}^1$

素因数の和:4319

約数の個数: 72

約数和(自身を含む): 40581632000

約数和(自身を除く): 19581327124

約数列:

[1, 2, 4, 19, 29, 38, 58, 76, 79, 116, 158, 316, 551, 841, 1102, 1501, 1682, 2204, 2291, 3002, 3364, 4159, 4582, 6004, 8318, 9164, 15979, 16636, 31958, 43529, 63916, 66439, 79021, 87058, 120611, 132878, 158042, 174116, 241222, 265756, 316084, 328561, 482444, 657122, 1262341, 1314244, 2291609, 2524682, 3497719, 4583218, 5049364, 6242659, 6995438, 9166436, 9528269, 12485318, 13990876, 19056538, 24970636, 38113076, 66456661, 132913322, 181037111, 265826644, 276319801, 362074222, 552639602, 724148444, 1105279204, 5250076219, 10500152438, 21000304876]

約数ペア:

[(1, 21000304876), (2, 10500152438), (4, 5250076219), (19, 1105279204), (29, 724148444), (38, 552639602), (58, 362074222), (76, 276319801), (79, 265826644), (116, 181037111), (158, 132913322), (316, 66456661), (551, 38113076), (841, 24970636), (1102, 19056538), (1501, 13990876), (1682, 12485318), (2204, 9528269), (2291, 9166436), (3002, 6995438), (3364, 6242659), (4159, 5049364), (4582, 4583218), (6004, 3497719), (8318, 2524682), (9164, 2291609), (15979, 1314244), (16636, 1262341), (31958, 657122), (43529, 482444), (63916, 328561), (66439, 316084), (79021, 265756), (87058, 241222), (120611, 174116), (132878, 158042)]