1999861720

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{131}}^1\times {\mathrm{379}}^1$

素因数の和:593

約数の個数: 128

約数和(自身を含む): 4875552000

約数和(自身を除く): 2875690280

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 53, 76, 95, 106, 131, 152, 190, 212, 262, 265, 379, 380, 424, 524, 530, 655, 758, 760, 1007, 1048, 1060, 1310, 1516, 1895, 2014, 2120, 2489, 2620, 3032, 3790, 4028, 4978, 5035, 5240, 6943, 7201, 7580, 8056, 9956, 10070, 12445, 13886, 14402, 15160, 19912, 20087, 20140, 24890, 27772, 28804, 34715, 36005, 40174, 40280, 49649, 49780, 55544, 57608, 69430, 72010, 80348, 99298, 99560, 100435, 131917, 138860, 144020, 160696, 198596, 200870, 248245, 263834, 277720, 288040, 381653, 397192, 401740, 496490, 527668, 659585, 763306, 803480, 943331, 992980, 1055336, 1319170, 1526612, 1886662, 1908265, 1985960, 2631397, 2638340, 3053224, 3773324, 3816530, 4716655, 5262794, 5276680, 7546648, 7633060, 9433310, 10525588, 13156985, 15266120, 18866620, 21051176, 26313970, 37733240, 49996543, 52627940, 99993086, 105255880, 199986172, 249982715, 399972344, 499965430, 999930860, 1999861720]

約数ペア:

[(1, 1999861720), (2, 999930860), (4, 499965430), (5, 399972344), (8, 249982715), (10, 199986172), (19, 105255880), (20, 99993086), (38, 52627940), (40, 49996543), (53, 37733240), (76, 26313970), (95, 21051176), (106, 18866620), (131, 15266120), (152, 13156985), (190, 10525588), (212, 9433310), (262, 7633060), (265, 7546648), (379, 5276680), (380, 5262794), (424, 4716655), (524, 3816530), (530, 3773324), (655, 3053224), (758, 2638340), (760, 2631397), (1007, 1985960), (1048, 1908265), (1060, 1886662), (1310, 1526612), (1516, 1319170), (1895, 1055336), (2014, 992980), (2120, 943331), (2489, 803480), (2620, 763306), (3032, 659585), (3790, 527668), (4028, 496490), (4978, 401740), (5035, 397192), (5240, 381653), (6943, 288040), (7201, 277720), (7580, 263834), (8056, 248245), (9956, 200870), (10070, 198596), (12445, 160696), (13886, 144020), (14402, 138860), (15160, 131917), (19912, 100435), (20087, 99560), (20140, 99298), (24890, 80348), (27772, 72010), (28804, 69430), (34715, 57608), (36005, 55544), (40174, 49780), (40280, 49649)]