21812840

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{31}}^1\times {\mathrm{359}}^1$

素因数の和:415

約数の個数: 96

約数和(自身を含む): 59097600

約数和(自身を除く): 37284760

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 31, 35, 40, 49, 56, 62, 70, 98, 124, 140, 155, 196, 217, 245, 248, 280, 310, 359, 392, 434, 490, 620, 718, 868, 980, 1085, 1240, 1436, 1519, 1736, 1795, 1960, 2170, 2513, 2872, 3038, 3590, 4340, 5026, 6076, 7180, 7595, 8680, 10052, 11129, 12152, 12565, 14360, 15190, 17591, 20104, 22258, 25130, 30380, 35182, 44516, 50260, 55645, 60760, 70364, 77903, 87955, 89032, 100520, 111290, 140728, 155806, 175910, 222580, 311612, 351820, 389515, 445160, 545321, 623224, 703640, 779030, 1090642, 1558060, 2181284, 2726605, 3116120, 4362568, 5453210, 10906420, 21812840]

約数ペア:

[(1, 21812840), (2, 10906420), (4, 5453210), (5, 4362568), (7, 3116120), (8, 2726605), (10, 2181284), (14, 1558060), (20, 1090642), (28, 779030), (31, 703640), (35, 623224), (40, 545321), (49, 445160), (56, 389515), (62, 351820), (70, 311612), (98, 222580), (124, 175910), (140, 155806), (155, 140728), (196, 111290), (217, 100520), (245, 89032), (248, 87955), (280, 77903), (310, 70364), (359, 60760), (392, 55645), (434, 50260), (490, 44516), (620, 35182), (718, 30380), (868, 25130), (980, 22258), (1085, 20104), (1240, 17591), (1436, 15190), (1519, 14360), (1736, 12565), (1795, 12152), (1960, 11129), (2170, 10052), (2513, 8680), (2872, 7595), (3038, 7180), (3590, 6076), (4340, 5026)]