81207540

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{331}}^1$

素因数の和:422

約数の個数: 144

約数和(自身を含む): 261031680

約数和(自身を除く): 179824140

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 29, 30, 36, 45, 47, 58, 60, 87, 90, 94, 116, 141, 145, 174, 180, 188, 235, 261, 282, 290, 331, 348, 423, 435, 470, 522, 564, 580, 662, 705, 846, 870, 940, 993, 1044, 1305, 1324, 1363, 1410, 1655, 1692, 1740, 1986, 2115, 2610, 2726, 2820, 2979, 3310, 3972, 4089, 4230, 4965, 5220, 5452, 5958, 6620, 6815, 8178, 8460, 9599, 9930, 11916, 12267, 13630, 14895, 15557, 16356, 19198, 19860, 20445, 24534, 27260, 28797, 29790, 31114, 38396, 40890, 46671, 47995, 49068, 57594, 59580, 61335, 62228, 77785, 81780, 86391, 93342, 95990, 115188, 122670, 140013, 143985, 155570, 172782, 186684, 191980, 233355, 245340, 280026, 287970, 311140, 345564, 431955, 451153, 466710, 560052, 575940, 700065, 863910, 902306, 933420, 1353459, 1400130, 1727820, 1804612, 2255765, 2706918, 2800260, 4060377, 4511530, 5413836, 6767295, 8120754, 9023060, 13534590, 16241508, 20301885, 27069180, 40603770, 81207540]

約数ペア:

[(1, 81207540), (2, 40603770), (3, 27069180), (4, 20301885), (5, 16241508), (6, 13534590), (9, 9023060), (10, 8120754), (12, 6767295), (15, 5413836), (18, 4511530), (20, 4060377), (29, 2800260), (30, 2706918), (36, 2255765), (45, 1804612), (47, 1727820), (58, 1400130), (60, 1353459), (87, 933420), (90, 902306), (94, 863910), (116, 700065), (141, 575940), (145, 560052), (174, 466710), (180, 451153), (188, 431955), (235, 345564), (261, 311140), (282, 287970), (290, 280026), (331, 245340), (348, 233355), (423, 191980), (435, 186684), (470, 172782), (522, 155570), (564, 143985), (580, 140013), (662, 122670), (705, 115188), (846, 95990), (870, 93342), (940, 86391), (993, 81780), (1044, 77785), (1305, 62228), (1324, 61335), (1363, 59580), (1410, 57594), (1655, 49068), (1692, 47995), (1740, 46671), (1986, 40890), (2115, 38396), (2610, 31114), (2726, 29790), (2820, 28797), (2979, 27260), (3310, 24534), (3972, 20445), (4089, 19860), (4230, 19198), (4965, 16356), (5220, 15557), (5452, 14895), (5958, 13630), (6620, 12267), (6815, 11916), (8178, 9930), (8460, 9599)]