21721140

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{17239}}^1$

素因数の和:17261

約数の個数: 72

約数和(自身を含む): 75304320

約数和(自身を除く): 53583180

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 126, 140, 180, 210, 252, 315, 420, 630, 1260, 17239, 34478, 51717, 68956, 86195, 103434, 120673, 155151, 172390, 206868, 241346, 258585, 310302, 344780, 362019, 482692, 517170, 603365, 620604, 724038, 775755, 1034340, 1086057, 1206730, 1448076, 1551510, 1810095, 2172114, 2413460, 3103020, 3620190, 4344228, 5430285, 7240380, 10860570, 21721140]

約数ペア:

[(1, 21721140), (2, 10860570), (3, 7240380), (4, 5430285), (5, 4344228), (6, 3620190), (7, 3103020), (9, 2413460), (10, 2172114), (12, 1810095), (14, 1551510), (15, 1448076), (18, 1206730), (20, 1086057), (21, 1034340), (28, 775755), (30, 724038), (35, 620604), (36, 603365), (42, 517170), (45, 482692), (60, 362019), (63, 344780), (70, 310302), (84, 258585), (90, 241346), (105, 206868), (126, 172390), (140, 155151), (180, 120673), (210, 103434), (252, 86195), (315, 68956), (420, 51717), (630, 34478), (1260, 17239)]