21521420

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{127}}^1\times {\mathrm{229}}^1$

素因数の和:402

約数の個数: 48

約数和(自身を含む): 46986240

約数和(自身を除く): 25464820

約数列:

[1, 2, 4, 5, 10, 20, 37, 74, 127, 148, 185, 229, 254, 370, 458, 508, 635, 740, 916, 1145, 1270, 2290, 2540, 4580, 4699, 8473, 9398, 16946, 18796, 23495, 29083, 33892, 42365, 46990, 58166, 84730, 93980, 116332, 145415, 169460, 290830, 581660, 1076071, 2152142, 4304284, 5380355, 10760710, 21521420]

約数ペア:

[(1, 21521420), (2, 10760710), (4, 5380355), (5, 4304284), (10, 2152142), (20, 1076071), (37, 581660), (74, 290830), (127, 169460), (148, 145415), (185, 116332), (229, 93980), (254, 84730), (370, 58166), (458, 46990), (508, 42365), (635, 33892), (740, 29083), (916, 23495), (1145, 18796), (1270, 16946), (2290, 9398), (2540, 8473), (4580, 4699)]