18940040

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{173}}^1$

素因数の和:231

約数の個数: 128

約数和(自身を含む): 54120960

約数和(自身を除く): 35180920

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 17, 20, 23, 28, 34, 35, 40, 46, 56, 68, 70, 85, 92, 115, 119, 136, 140, 161, 170, 173, 184, 230, 238, 280, 322, 340, 346, 391, 460, 476, 595, 644, 680, 692, 782, 805, 865, 920, 952, 1190, 1211, 1288, 1384, 1564, 1610, 1730, 1955, 2380, 2422, 2737, 2941, 3128, 3220, 3460, 3910, 3979, 4760, 4844, 5474, 5882, 6055, 6440, 6920, 7820, 7958, 9688, 10948, 11764, 12110, 13685, 14705, 15640, 15916, 19895, 20587, 21896, 23528, 24220, 27370, 27853, 29410, 31832, 39790, 41174, 48440, 54740, 55706, 58820, 67643, 79580, 82348, 102935, 109480, 111412, 117640, 135286, 139265, 159160, 164696, 205870, 222824, 270572, 278530, 338215, 411740, 473501, 541144, 557060, 676430, 823480, 947002, 1114120, 1352860, 1894004, 2367505, 2705720, 3788008, 4735010, 9470020, 18940040]

約数ペア:

[(1, 18940040), (2, 9470020), (4, 4735010), (5, 3788008), (7, 2705720), (8, 2367505), (10, 1894004), (14, 1352860), (17, 1114120), (20, 947002), (23, 823480), (28, 676430), (34, 557060), (35, 541144), (40, 473501), (46, 411740), (56, 338215), (68, 278530), (70, 270572), (85, 222824), (92, 205870), (115, 164696), (119, 159160), (136, 139265), (140, 135286), (161, 117640), (170, 111412), (173, 109480), (184, 102935), (230, 82348), (238, 79580), (280, 67643), (322, 58820), (340, 55706), (346, 54740), (391, 48440), (460, 41174), (476, 39790), (595, 31832), (644, 29410), (680, 27853), (692, 27370), (782, 24220), (805, 23528), (865, 21896), (920, 20587), (952, 19895), (1190, 15916), (1211, 15640), (1288, 14705), (1384, 13685), (1564, 12110), (1610, 11764), (1730, 10948), (1955, 9688), (2380, 7958), (2422, 7820), (2737, 6920), (2941, 6440), (3128, 6055), (3220, 5882), (3460, 5474), (3910, 4844), (3979, 4760)]