81613840

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13249}}^1$

素因数の和:13280

約数の個数: 80

約数和(自身を含む): 236592000

約数和(自身を除く): 154978160

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 16, 20, 22, 28, 35, 40, 44, 55, 56, 70, 77, 80, 88, 110, 112, 140, 154, 176, 220, 280, 308, 385, 440, 560, 616, 770, 880, 1232, 1540, 3080, 6160, 13249, 26498, 52996, 66245, 92743, 105992, 132490, 145739, 185486, 211984, 264980, 291478, 370972, 463715, 529960, 582956, 728695, 741944, 927430, 1020173, 1059920, 1165912, 1457390, 1483888, 1854860, 2040346, 2331824, 2914780, 3709720, 4080692, 5100865, 5829560, 7419440, 8161384, 10201730, 11659120, 16322768, 20403460, 40806920, 81613840]

約数ペア:

[(1, 81613840), (2, 40806920), (4, 20403460), (5, 16322768), (7, 11659120), (8, 10201730), (10, 8161384), (11, 7419440), (14, 5829560), (16, 5100865), (20, 4080692), (22, 3709720), (28, 2914780), (35, 2331824), (40, 2040346), (44, 1854860), (55, 1483888), (56, 1457390), (70, 1165912), (77, 1059920), (80, 1020173), (88, 927430), (110, 741944), (112, 728695), (140, 582956), (154, 529960), (176, 463715), (220, 370972), (280, 291478), (308, 264980), (385, 211984), (440, 185486), (560, 145739), (616, 132490), (770, 105992), (880, 92743), (1232, 66245), (1540, 52996), (3080, 26498), (6160, 13249)]