20523420

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{353}}^1$

素因数の和:404

約数の個数: 144

約数和(自身を含む): 69582240

約数和(自身を除く): 49058820

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 17, 18, 19, 20, 30, 34, 36, 38, 45, 51, 57, 60, 68, 76, 85, 90, 95, 102, 114, 153, 170, 171, 180, 190, 204, 228, 255, 285, 306, 323, 340, 342, 353, 380, 510, 570, 612, 646, 684, 706, 765, 855, 969, 1020, 1059, 1140, 1292, 1412, 1530, 1615, 1710, 1765, 1938, 2118, 2907, 3060, 3177, 3230, 3420, 3530, 3876, 4236, 4845, 5295, 5814, 6001, 6354, 6460, 6707, 7060, 9690, 10590, 11628, 12002, 12708, 13414, 14535, 15885, 18003, 19380, 20121, 21180, 24004, 26828, 29070, 30005, 31770, 33535, 36006, 40242, 54009, 58140, 60010, 60363, 63540, 67070, 72012, 80484, 90015, 100605, 108018, 114019, 120020, 120726, 134140, 180030, 201210, 216036, 228038, 241452, 270045, 301815, 342057, 360060, 402420, 456076, 540090, 570095, 603630, 684114, 1026171, 1080180, 1140190, 1207260, 1368228, 1710285, 2052342, 2280380, 3420570, 4104684, 5130855, 6841140, 10261710, 20523420]

約数ペア:

[(1, 20523420), (2, 10261710), (3, 6841140), (4, 5130855), (5, 4104684), (6, 3420570), (9, 2280380), (10, 2052342), (12, 1710285), (15, 1368228), (17, 1207260), (18, 1140190), (19, 1080180), (20, 1026171), (30, 684114), (34, 603630), (36, 570095), (38, 540090), (45, 456076), (51, 402420), (57, 360060), (60, 342057), (68, 301815), (76, 270045), (85, 241452), (90, 228038), (95, 216036), (102, 201210), (114, 180030), (153, 134140), (170, 120726), (171, 120020), (180, 114019), (190, 108018), (204, 100605), (228, 90015), (255, 80484), (285, 72012), (306, 67070), (323, 63540), (340, 60363), (342, 60010), (353, 58140), (380, 54009), (510, 40242), (570, 36006), (612, 33535), (646, 31770), (684, 30005), (706, 29070), (765, 26828), (855, 24004), (969, 21180), (1020, 20121), (1059, 19380), (1140, 18003), (1292, 15885), (1412, 14535), (1530, 13414), (1615, 12708), (1710, 12002), (1765, 11628), (1938, 10590), (2118, 9690), (2907, 7060), (3060, 6707), (3177, 6460), (3230, 6354), (3420, 6001), (3530, 5814), (3876, 5295), (4236, 4845)]