19704020

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{17}}^2\times {\mathrm{487}}^1$

素因数の和:537

約数の個数: 72

約数和(自身を含む): 50338176

約数和(自身を除く): 30634156

約数列:

[1, 2, 4, 5, 7, 10, 14, 17, 20, 28, 34, 35, 68, 70, 85, 119, 140, 170, 238, 289, 340, 476, 487, 578, 595, 974, 1156, 1190, 1445, 1948, 2023, 2380, 2435, 2890, 3409, 4046, 4870, 5780, 6818, 8092, 8279, 9740, 10115, 13636, 16558, 17045, 20230, 33116, 34090, 40460, 41395, 57953, 68180, 82790, 115906, 140743, 165580, 231812, 281486, 289765, 562972, 579530, 703715, 985201, 1159060, 1407430, 1970402, 2814860, 3940804, 4926005, 9852010, 19704020]

約数ペア:

[(1, 19704020), (2, 9852010), (4, 4926005), (5, 3940804), (7, 2814860), (10, 1970402), (14, 1407430), (17, 1159060), (20, 985201), (28, 703715), (34, 579530), (35, 562972), (68, 289765), (70, 281486), (85, 231812), (119, 165580), (140, 140743), (170, 115906), (238, 82790), (289, 68180), (340, 57953), (476, 41395), (487, 40460), (578, 34090), (595, 33116), (974, 20230), (1156, 17045), (1190, 16558), (1445, 13636), (1948, 10115), (2023, 9740), (2380, 8279), (2435, 8092), (2890, 6818), (3409, 5780), (4046, 4870)]