21413560

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{2467}}^1$

素因数の和:2516

約数の個数: 64

約数和(自身を含む): 56862720

約数和(自身を除く): 35449160

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 31, 35, 40, 56, 62, 70, 124, 140, 155, 217, 248, 280, 310, 434, 620, 868, 1085, 1240, 1736, 2170, 2467, 4340, 4934, 8680, 9868, 12335, 17269, 19736, 24670, 34538, 49340, 69076, 76477, 86345, 98680, 138152, 152954, 172690, 305908, 345380, 382385, 535339, 611816, 690760, 764770, 1070678, 1529540, 2141356, 2676695, 3059080, 4282712, 5353390, 10706780, 21413560]

約数ペア:

[(1, 21413560), (2, 10706780), (4, 5353390), (5, 4282712), (7, 3059080), (8, 2676695), (10, 2141356), (14, 1529540), (20, 1070678), (28, 764770), (31, 690760), (35, 611816), (40, 535339), (56, 382385), (62, 345380), (70, 305908), (124, 172690), (140, 152954), (155, 138152), (217, 98680), (248, 86345), (280, 76477), (310, 69076), (434, 49340), (620, 34538), (868, 24670), (1085, 19736), (1240, 17269), (1736, 12335), (2170, 9868), (2467, 8680), (4340, 4934)]