21961380

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{52289}}^1$

素因数の和:52308

約数の個数: 48

約数和(自身を含む): 70277760

約数和(自身を除く): 48316380

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 52289, 104578, 156867, 209156, 261445, 313734, 366023, 522890, 627468, 732046, 784335, 1045780, 1098069, 1464092, 1568670, 1830115, 2196138, 3137340, 3660230, 4392276, 5490345, 7320460, 10980690, 21961380]

約数ペア:

[(1, 21961380), (2, 10980690), (3, 7320460), (4, 5490345), (5, 4392276), (6, 3660230), (7, 3137340), (10, 2196138), (12, 1830115), (14, 1568670), (15, 1464092), (20, 1098069), (21, 1045780), (28, 784335), (30, 732046), (35, 627468), (42, 522890), (60, 366023), (70, 313734), (84, 261445), (105, 209156), (140, 156867), (210, 104578), (420, 52289)]