661327960

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{79}}^1\times {\mathrm{157}}^1$

素因数の和:321

約数の個数: 128

約数和(自身を含む): 1601740800

約数和(自身を除く): 940412840

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 43, 62, 79, 86, 124, 155, 157, 158, 172, 215, 248, 310, 314, 316, 344, 395, 430, 620, 628, 632, 785, 790, 860, 1240, 1256, 1333, 1570, 1580, 1720, 2449, 2666, 3140, 3160, 3397, 4867, 4898, 5332, 6280, 6665, 6751, 6794, 9734, 9796, 10664, 12245, 12403, 13330, 13502, 13588, 16985, 19468, 19592, 24335, 24490, 24806, 26660, 27004, 27176, 33755, 33970, 38936, 48670, 48980, 49612, 53320, 54008, 62015, 67510, 67940, 97340, 97960, 99224, 105307, 124030, 135020, 135880, 194680, 209281, 210614, 248060, 270040, 384493, 418562, 421228, 496120, 526535, 533329, 768986, 837124, 842456, 1046405, 1053070, 1066658, 1537972, 1674248, 1922465, 2092810, 2106140, 2133316, 2666645, 3075944, 3844930, 4185620, 4212280, 4266632, 5333290, 7689860, 8371240, 10666580, 15379720, 16533199, 21333160, 33066398, 66132796, 82665995, 132265592, 165331990, 330663980, 661327960]

約数ペア:

[(1, 661327960), (2, 330663980), (4, 165331990), (5, 132265592), (8, 82665995), (10, 66132796), (20, 33066398), (31, 21333160), (40, 16533199), (43, 15379720), (62, 10666580), (79, 8371240), (86, 7689860), (124, 5333290), (155, 4266632), (157, 4212280), (158, 4185620), (172, 3844930), (215, 3075944), (248, 2666645), (310, 2133316), (314, 2106140), (316, 2092810), (344, 1922465), (395, 1674248), (430, 1537972), (620, 1066658), (628, 1053070), (632, 1046405), (785, 842456), (790, 837124), (860, 768986), (1240, 533329), (1256, 526535), (1333, 496120), (1570, 421228), (1580, 418562), (1720, 384493), (2449, 270040), (2666, 248060), (3140, 210614), (3160, 209281), (3397, 194680), (4867, 135880), (4898, 135020), (5332, 124030), (6280, 105307), (6665, 99224), (6751, 97960), (6794, 97340), (9734, 67940), (9796, 67510), (10664, 62015), (12245, 54008), (12403, 53320), (13330, 49612), (13502, 48980), (13588, 48670), (16985, 38936), (19468, 33970), (19592, 33755), (24335, 27176), (24490, 27004), (24806, 26660)]