21320460

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{16921}}^1$

素因数の和:16943

約数の個数: 72

約数和(自身を含む): 73915296

約数和(自身を除く): 52594836

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, 16921, 33842, 50763, 67684, 84605, 101526, 118447, 152289, 169210, 203052, 236894, 253815, 304578, 338420, 355341, 473788, 507630, 592235, 609156, 710682, 761445, 1015260, 1066023, 1184470, 1421364, 1522890, 1776705, 2132046, 2368940, 3045780, 3553410, 4264092, 5330115, 7106820, 10660230, 21320460]

約数ペア:

[(1, 21320460), (2, 10660230), (3, 7106820), (4, 5330115), (5, 4264092), (6, 3553410), (7, 3045780), (9, 2368940), (10, 2132046), (12, 1776705), (14, 1522890), (15, 1421364), (18, 1184470), (20, 1066023), (21, 1015260), (28, 761445), (30, 710682), (35, 609156), (36, 592235), (42, 507630), (45, 473788), (60, 355341), (63, 338420), (70, 304578), (84, 253815), (90, 236894), (105, 203052), (126, 169210), (140, 152289), (180, 118447), (210, 101526), (252, 84605), (315, 67684), (420, 50763), (630, 33842), (1260, 16921)]