20872280

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{89}}^1$

素因数の和:165

約数の個数: 128

約数和(自身を含む): 57153600

約数和(自身を除く): 36281320

約数列:

[1, 2, 4, 5, 8, 10, 11, 13, 20, 22, 26, 40, 41, 44, 52, 55, 65, 82, 88, 89, 104, 110, 130, 143, 164, 178, 205, 220, 260, 286, 328, 356, 410, 440, 445, 451, 520, 533, 572, 712, 715, 820, 890, 902, 979, 1066, 1144, 1157, 1430, 1640, 1780, 1804, 1958, 2132, 2255, 2314, 2665, 2860, 3560, 3608, 3649, 3916, 4264, 4510, 4628, 4895, 5330, 5720, 5785, 5863, 7298, 7832, 9020, 9256, 9790, 10660, 11570, 11726, 12727, 14596, 18040, 18245, 19580, 21320, 23140, 23452, 25454, 29192, 29315, 36490, 39160, 40139, 46280, 46904, 47437, 50908, 58630, 63635, 72980, 80278, 94874, 101816, 117260, 127270, 145960, 160556, 189748, 200695, 234520, 237185, 254540, 321112, 379496, 401390, 474370, 509080, 521807, 802780, 948740, 1043614, 1605560, 1897480, 2087228, 2609035, 4174456, 5218070, 10436140, 20872280]

約数ペア:

[(1, 20872280), (2, 10436140), (4, 5218070), (5, 4174456), (8, 2609035), (10, 2087228), (11, 1897480), (13, 1605560), (20, 1043614), (22, 948740), (26, 802780), (40, 521807), (41, 509080), (44, 474370), (52, 401390), (55, 379496), (65, 321112), (82, 254540), (88, 237185), (89, 234520), (104, 200695), (110, 189748), (130, 160556), (143, 145960), (164, 127270), (178, 117260), (205, 101816), (220, 94874), (260, 80278), (286, 72980), (328, 63635), (356, 58630), (410, 50908), (440, 47437), (445, 46904), (451, 46280), (520, 40139), (533, 39160), (572, 36490), (712, 29315), (715, 29192), (820, 25454), (890, 23452), (902, 23140), (979, 21320), (1066, 19580), (1144, 18245), (1157, 18040), (1430, 14596), (1640, 12727), (1780, 11726), (1804, 11570), (1958, 10660), (2132, 9790), (2255, 9256), (2314, 9020), (2665, 7832), (2860, 7298), (3560, 5863), (3608, 5785), (3649, 5720), (3916, 5330), (4264, 4895), (4510, 4628)]