21083720

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{31}}^1\times {\mathrm{347}}^1$

素因数の和:403

約数の個数: 96

約数和(自身を含む): 57127680

約数和(自身を除く): 36043960

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, 347, 392, 434, 490, 620, 694, 868, 980, 1085, 1240, 1388, 1519, 1735, 1736, 1960, 2170, 2429, 2776, 3038, 3470, 4340, 4858, 6076, 6940, 7595, 8680, 9716, 10757, 12145, 12152, 13880, 15190, 17003, 19432, 21514, 24290, 30380, 34006, 43028, 48580, 53785, 60760, 68012, 75299, 85015, 86056, 97160, 107570, 136024, 150598, 170030, 215140, 301196, 340060, 376495, 430280, 527093, 602392, 680120, 752990, 1054186, 1505980, 2108372, 2635465, 3011960, 4216744, 5270930, 10541860, 21083720]

約数ペア:

[(1, 21083720), (2, 10541860), (4, 5270930), (5, 4216744), (7, 3011960), (8, 2635465), (10, 2108372), (14, 1505980), (20, 1054186), (28, 752990), (31, 680120), (35, 602392), (40, 527093), (49, 430280), (56, 376495), (62, 340060), (70, 301196), (98, 215140), (124, 170030), (140, 150598), (155, 136024), (196, 107570), (217, 97160), (245, 86056), (248, 85015), (280, 75299), (310, 68012), (347, 60760), (392, 53785), (434, 48580), (490, 43028), (620, 34006), (694, 30380), (868, 24290), (980, 21514), (1085, 19432), (1240, 17003), (1388, 15190), (1519, 13880), (1735, 12152), (1736, 12145), (1960, 10757), (2170, 9716), (2429, 8680), (2776, 7595), (3038, 6940), (3470, 6076), (4340, 4858)]