20984106

素因数分解:

$2^1\times 3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{661}}^1$

素因数の和:727

約数の個数: 64

約数和(自身を含む): 50714496

約数和(自身を除く): 29730390

約数列:

[1, 2, 3, 6, 11, 13, 22, 26, 33, 37, 39, 66, 74, 78, 111, 143, 222, 286, 407, 429, 481, 661, 814, 858, 962, 1221, 1322, 1443, 1983, 2442, 2886, 3966, 5291, 7271, 8593, 10582, 14542, 15873, 17186, 21813, 24457, 25779, 31746, 43626, 48914, 51558, 73371, 94523, 146742, 189046, 269027, 283569, 317941, 538054, 567138, 635882, 807081, 953823, 1614162, 1907646, 3497351, 6994702, 10492053, 20984106]

約数ペア:

[(1, 20984106), (2, 10492053), (3, 6994702), (6, 3497351), (11, 1907646), (13, 1614162), (22, 953823), (26, 807081), (33, 635882), (37, 567138), (39, 538054), (66, 317941), (74, 283569), (78, 269027), (111, 189046), (143, 146742), (222, 94523), (286, 73371), (407, 51558), (429, 48914), (481, 43626), (661, 31746), (814, 25779), (858, 24457), (962, 21813), (1221, 17186), (1322, 15873), (1443, 14542), (1983, 10582), (2442, 8593), (2886, 7271), (3966, 5291)]