20121608

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{599}}^1$

素因数の和:654

約数の個数: 64

約数和(自身を含む): 45360000

約数和(自身を除く): 25238392

約数列:

[1, 2, 4, 8, 13, 17, 19, 26, 34, 38, 52, 68, 76, 104, 136, 152, 221, 247, 323, 442, 494, 599, 646, 884, 988, 1198, 1292, 1768, 1976, 2396, 2584, 4199, 4792, 7787, 8398, 10183, 11381, 15574, 16796, 20366, 22762, 31148, 33592, 40732, 45524, 62296, 81464, 91048, 132379, 147953, 193477, 264758, 295906, 386954, 529516, 591812, 773908, 1059032, 1183624, 1547816, 2515201, 5030402, 10060804, 20121608]

約数ペア:

[(1, 20121608), (2, 10060804), (4, 5030402), (8, 2515201), (13, 1547816), (17, 1183624), (19, 1059032), (26, 773908), (34, 591812), (38, 529516), (52, 386954), (68, 295906), (76, 264758), (104, 193477), (136, 147953), (152, 132379), (221, 91048), (247, 81464), (323, 62296), (442, 45524), (494, 40732), (599, 33592), (646, 31148), (884, 22762), (988, 20366), (1198, 16796), (1292, 15574), (1768, 11381), (1976, 10183), (2396, 8398), (2584, 7787), (4199, 4792)]