20123831680

素因数分解:

$2^7\times 5^1\times {\mathrm{61}}^1\times {\mathrm{499}}^1\times {\mathrm{1033}}^1$

素因数の和:1612

約数の個数: 128

約数和(自身を含む): 49042620000

約数和(自身を除く): 28918788320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 61, 64, 80, 122, 128, 160, 244, 305, 320, 488, 499, 610, 640, 976, 998, 1033, 1220, 1952, 1996, 2066, 2440, 2495, 3904, 3992, 4132, 4880, 4990, 5165, 7808, 7984, 8264, 9760, 9980, 10330, 15968, 16528, 19520, 19960, 20660, 30439, 31936, 33056, 39040, 39920, 41320, 60878, 63013, 63872, 66112, 79840, 82640, 121756, 126026, 132224, 152195, 159680, 165280, 243512, 252052, 304390, 315065, 319360, 330560, 487024, 504104, 515467, 608780, 630130, 661120, 974048, 1008208, 1030934, 1217560, 1260260, 1948096, 2016416, 2061868, 2435120, 2520520, 2577335, 3896192, 4032832, 4123736, 4870240, 5041040, 5154670, 8065664, 8247472, 9740480, 10082080, 10309340, 16494944, 19480960, 20164160, 20618680, 31443487, 32989888, 40328320, 41237360, 62886974, 65979776, 82474720, 125773948, 157217435, 164949440, 251547896, 314434870, 329898880, 503095792, 628869740, 1006191584, 1257739480, 2012383168, 2515478960, 4024766336, 5030957920, 10061915840, 20123831680]

約数ペア:

[(1, 20123831680), (2, 10061915840), (4, 5030957920), (5, 4024766336), (8, 2515478960), (10, 2012383168), (16, 1257739480), (20, 1006191584), (32, 628869740), (40, 503095792), (61, 329898880), (64, 314434870), (80, 251547896), (122, 164949440), (128, 157217435), (160, 125773948), (244, 82474720), (305, 65979776), (320, 62886974), (488, 41237360), (499, 40328320), (610, 32989888), (640, 31443487), (976, 20618680), (998, 20164160), (1033, 19480960), (1220, 16494944), (1952, 10309340), (1996, 10082080), (2066, 9740480), (2440, 8247472), (2495, 8065664), (3904, 5154670), (3992, 5041040), (4132, 4870240), (4880, 4123736), (4990, 4032832), (5165, 3896192), (7808, 2577335), (7984, 2520520), (8264, 2435120), (9760, 2061868), (9980, 2016416), (10330, 1948096), (15968, 1260260), (16528, 1217560), (19520, 1030934), (19960, 1008208), (20660, 974048), (30439, 661120), (31936, 630130), (33056, 608780), (39040, 515467), (39920, 504104), (41320, 487024), (60878, 330560), (63013, 319360), (63872, 315065), (66112, 304390), (79840, 252052), (82640, 243512), (121756, 165280), (126026, 159680), (132224, 152195)]