28040740

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1$

素因数の和:138

約数の個数: 144

約数和(自身を含む): 77220864

約数和(自身を除く): 49180124

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 31, 35, 49, 52, 62, 65, 70, 71, 91, 98, 124, 130, 140, 142, 155, 182, 196, 217, 245, 260, 284, 310, 355, 364, 403, 434, 455, 490, 497, 620, 637, 710, 806, 868, 910, 923, 980, 994, 1085, 1274, 1420, 1519, 1612, 1820, 1846, 1988, 2015, 2170, 2201, 2485, 2548, 2821, 3038, 3185, 3479, 3692, 4030, 4340, 4402, 4615, 4970, 5642, 6076, 6370, 6461, 6958, 7595, 8060, 8804, 9230, 9940, 11005, 11284, 12740, 12922, 13916, 14105, 15190, 15407, 17395, 18460, 19747, 22010, 25844, 28210, 28613, 30380, 30814, 32305, 34790, 39494, 44020, 45227, 56420, 57226, 61628, 64610, 69580, 77035, 78988, 90454, 98735, 107849, 114452, 129220, 143065, 154070, 180908, 197470, 200291, 215698, 226135, 286130, 308140, 394940, 400582, 431396, 452270, 539245, 572260, 801164, 904540, 1001455, 1078490, 1402037, 2002910, 2156980, 2804074, 4005820, 5608148, 7010185, 14020370, 28040740]

約数ペア:

[(1, 28040740), (2, 14020370), (4, 7010185), (5, 5608148), (7, 4005820), (10, 2804074), (13, 2156980), (14, 2002910), (20, 1402037), (26, 1078490), (28, 1001455), (31, 904540), (35, 801164), (49, 572260), (52, 539245), (62, 452270), (65, 431396), (70, 400582), (71, 394940), (91, 308140), (98, 286130), (124, 226135), (130, 215698), (140, 200291), (142, 197470), (155, 180908), (182, 154070), (196, 143065), (217, 129220), (245, 114452), (260, 107849), (284, 98735), (310, 90454), (355, 78988), (364, 77035), (403, 69580), (434, 64610), (455, 61628), (490, 57226), (497, 56420), (620, 45227), (637, 44020), (710, 39494), (806, 34790), (868, 32305), (910, 30814), (923, 30380), (980, 28613), (994, 28210), (1085, 25844), (1274, 22010), (1420, 19747), (1519, 18460), (1612, 17395), (1820, 15407), (1846, 15190), (1988, 14105), (2015, 13916), (2170, 12922), (2201, 12740), (2485, 11284), (2548, 11005), (2821, 9940), (3038, 9230), (3185, 8804), (3479, 8060), (3692, 7595), (4030, 6958), (4340, 6461), (4402, 6370), (4615, 6076), (4970, 5642)]