21000983990

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{1747}}^1\times {\mathrm{24533}}^1$

素因数の和:26301

約数の個数: 48

約数和(自身を含む): 44000453232

約数和(自身を除く): 22999469242

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 245, 490, 1747, 3494, 8735, 12229, 17470, 24458, 24533, 49066, 61145, 85603, 122290, 122665, 171206, 171731, 245330, 343462, 428015, 856030, 858655, 1202117, 1717310, 2404234, 6010585, 12021170, 42859151, 85718302, 214295755, 300014057, 428591510, 600028114, 1500070285, 2100098399, 3000140570, 4200196798, 10500491995, 21000983990]

約数ペア:

[(1, 21000983990), (2, 10500491995), (5, 4200196798), (7, 3000140570), (10, 2100098399), (14, 1500070285), (35, 600028114), (49, 428591510), (70, 300014057), (98, 214295755), (245, 85718302), (490, 42859151), (1747, 12021170), (3494, 6010585), (8735, 2404234), (12229, 1717310), (17470, 1202117), (24458, 858655), (24533, 856030), (49066, 428015), (61145, 343462), (85603, 245330), (122290, 171731), (122665, 171206)]