21536760

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{25639}}^1$

素因数の和:25660

約数の個数: 64

約数和(自身を含む): 73843200

約数和(自身を除く): 52306440

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840, 25639, 51278, 76917, 102556, 128195, 153834, 179473, 205112, 256390, 307668, 358946, 384585, 512780, 538419, 615336, 717892, 769170, 897365, 1025560, 1076838, 1435784, 1538340, 1794730, 2153676, 2692095, 3076680, 3589460, 4307352, 5384190, 7178920, 10768380, 21536760]

約数ペア:

[(1, 21536760), (2, 10768380), (3, 7178920), (4, 5384190), (5, 4307352), (6, 3589460), (7, 3076680), (8, 2692095), (10, 2153676), (12, 1794730), (14, 1538340), (15, 1435784), (20, 1076838), (21, 1025560), (24, 897365), (28, 769170), (30, 717892), (35, 615336), (40, 538419), (42, 512780), (56, 384585), (60, 358946), (70, 307668), (84, 256390), (105, 205112), (120, 179473), (140, 153834), (168, 128195), (210, 102556), (280, 76917), (420, 51278), (840, 25639)]