81447680

素因数分解:

$2^8\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{197}}^1$

素因数の和:254

約数の個数: 144

約数和(自身を含む): 218544480

約数和(自身を除く): 137096800

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 19, 20, 32, 34, 38, 40, 64, 68, 76, 80, 85, 95, 128, 136, 152, 160, 170, 190, 197, 256, 272, 304, 320, 323, 340, 380, 394, 544, 608, 640, 646, 680, 760, 788, 985, 1088, 1216, 1280, 1292, 1360, 1520, 1576, 1615, 1970, 2176, 2432, 2584, 2720, 3040, 3152, 3230, 3349, 3743, 3940, 4352, 4864, 5168, 5440, 6080, 6304, 6460, 6698, 7486, 7880, 10336, 10880, 12160, 12608, 12920, 13396, 14972, 15760, 16745, 18715, 20672, 21760, 24320, 25216, 25840, 26792, 29944, 31520, 33490, 37430, 41344, 50432, 51680, 53584, 59888, 63040, 63631, 66980, 74860, 82688, 103360, 107168, 119776, 126080, 127262, 133960, 149720, 206720, 214336, 239552, 252160, 254524, 267920, 299440, 318155, 413440, 428672, 479104, 509048, 535840, 598880, 636310, 857344, 958208, 1018096, 1071680, 1197760, 1272620, 2036192, 2143360, 2395520, 2545240, 4072384, 4286720, 4791040, 5090480, 8144768, 10180960, 16289536, 20361920, 40723840, 81447680]

約数ペア:

[(1, 81447680), (2, 40723840), (4, 20361920), (5, 16289536), (8, 10180960), (10, 8144768), (16, 5090480), (17, 4791040), (19, 4286720), (20, 4072384), (32, 2545240), (34, 2395520), (38, 2143360), (40, 2036192), (64, 1272620), (68, 1197760), (76, 1071680), (80, 1018096), (85, 958208), (95, 857344), (128, 636310), (136, 598880), (152, 535840), (160, 509048), (170, 479104), (190, 428672), (197, 413440), (256, 318155), (272, 299440), (304, 267920), (320, 254524), (323, 252160), (340, 239552), (380, 214336), (394, 206720), (544, 149720), (608, 133960), (640, 127262), (646, 126080), (680, 119776), (760, 107168), (788, 103360), (985, 82688), (1088, 74860), (1216, 66980), (1280, 63631), (1292, 63040), (1360, 59888), (1520, 53584), (1576, 51680), (1615, 50432), (1970, 41344), (2176, 37430), (2432, 33490), (2584, 31520), (2720, 29944), (3040, 26792), (3152, 25840), (3230, 25216), (3349, 24320), (3743, 21760), (3940, 20672), (4352, 18715), (4864, 16745), (5168, 15760), (5440, 14972), (6080, 13396), (6304, 12920), (6460, 12608), (6698, 12160), (7486, 10880), (7880, 10336)]