21459680

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{137}}^1$

素因数の和:252

約数の個数: 96

約数和(自身を含む): 56337120

約数和(自身を除く): 34877440

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 80, 88, 89, 110, 137, 160, 176, 178, 220, 274, 352, 356, 440, 445, 548, 685, 712, 880, 890, 979, 1096, 1370, 1424, 1507, 1760, 1780, 1958, 2192, 2740, 2848, 3014, 3560, 3916, 4384, 4895, 5480, 6028, 7120, 7535, 7832, 9790, 10960, 12056, 12193, 14240, 15070, 15664, 19580, 21920, 24112, 24386, 30140, 31328, 39160, 48224, 48772, 60280, 60965, 78320, 97544, 120560, 121930, 134123, 156640, 195088, 241120, 243860, 268246, 390176, 487720, 536492, 670615, 975440, 1072984, 1341230, 1950880, 2145968, 2682460, 4291936, 5364920, 10729840, 21459680]

約数ペア:

[(1, 21459680), (2, 10729840), (4, 5364920), (5, 4291936), (8, 2682460), (10, 2145968), (11, 1950880), (16, 1341230), (20, 1072984), (22, 975440), (32, 670615), (40, 536492), (44, 487720), (55, 390176), (80, 268246), (88, 243860), (89, 241120), (110, 195088), (137, 156640), (160, 134123), (176, 121930), (178, 120560), (220, 97544), (274, 78320), (352, 60965), (356, 60280), (440, 48772), (445, 48224), (548, 39160), (685, 31328), (712, 30140), (880, 24386), (890, 24112), (979, 21920), (1096, 19580), (1370, 15664), (1424, 15070), (1507, 14240), (1760, 12193), (1780, 12056), (1958, 10960), (2192, 9790), (2740, 7832), (2848, 7535), (3014, 7120), (3560, 6028), (3916, 5480), (4384, 4895)]