21041580

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{421}}^1$

素因数の和:464

約数の個数: 144

約数和(自身を含む): 72739296

約数和(自身を除く): 51697716

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 17, 20, 21, 28, 30, 34, 35, 42, 49, 51, 60, 68, 70, 84, 85, 98, 102, 105, 119, 140, 147, 170, 196, 204, 210, 238, 245, 255, 294, 340, 357, 420, 421, 476, 490, 510, 588, 595, 714, 735, 833, 842, 980, 1020, 1190, 1263, 1428, 1470, 1666, 1684, 1785, 2105, 2380, 2499, 2526, 2940, 2947, 3332, 3570, 4165, 4210, 4998, 5052, 5894, 6315, 7140, 7157, 8330, 8420, 8841, 9996, 11788, 12495, 12630, 14314, 14735, 16660, 17682, 20629, 21471, 24990, 25260, 28628, 29470, 35364, 35785, 41258, 42942, 44205, 49980, 50099, 58940, 61887, 71570, 82516, 85884, 88410, 100198, 103145, 107355, 123774, 143140, 150297, 176820, 200396, 206290, 214710, 247548, 250495, 300594, 309435, 350693, 412580, 429420, 500990, 601188, 618870, 701386, 751485, 1001980, 1052079, 1237740, 1402772, 1502970, 1753465, 2104158, 3005940, 3506930, 4208316, 5260395, 7013860, 10520790, 21041580]

約数ペア:

[(1, 21041580), (2, 10520790), (3, 7013860), (4, 5260395), (5, 4208316), (6, 3506930), (7, 3005940), (10, 2104158), (12, 1753465), (14, 1502970), (15, 1402772), (17, 1237740), (20, 1052079), (21, 1001980), (28, 751485), (30, 701386), (34, 618870), (35, 601188), (42, 500990), (49, 429420), (51, 412580), (60, 350693), (68, 309435), (70, 300594), (84, 250495), (85, 247548), (98, 214710), (102, 206290), (105, 200396), (119, 176820), (140, 150297), (147, 143140), (170, 123774), (196, 107355), (204, 103145), (210, 100198), (238, 88410), (245, 85884), (255, 82516), (294, 71570), (340, 61887), (357, 58940), (420, 50099), (421, 49980), (476, 44205), (490, 42942), (510, 41258), (588, 35785), (595, 35364), (714, 29470), (735, 28628), (833, 25260), (842, 24990), (980, 21471), (1020, 20629), (1190, 17682), (1263, 16660), (1428, 14735), (1470, 14314), (1666, 12630), (1684, 12495), (1785, 11788), (2105, 9996), (2380, 8841), (2499, 8420), (2526, 8330), (2940, 7157), (2947, 7140), (3332, 6315), (3570, 5894), (4165, 5052), (4210, 4998)]