20454520

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{83}}^1\times {\mathrm{101}}^1$

素因数の和:256

約数の個数: 64

約数和(自身を含む): 47809440

約数和(自身を除く): 27354920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 83, 101, 122, 166, 202, 244, 305, 332, 404, 415, 488, 505, 610, 664, 808, 830, 1010, 1220, 1660, 2020, 2440, 3320, 4040, 5063, 6161, 8383, 10126, 12322, 16766, 20252, 24644, 25315, 30805, 33532, 40504, 41915, 49288, 50630, 61610, 67064, 83830, 101260, 123220, 167660, 202520, 246440, 335320, 511363, 1022726, 2045452, 2556815, 4090904, 5113630, 10227260, 20454520]

約数ペア:

[(1, 20454520), (2, 10227260), (4, 5113630), (5, 4090904), (8, 2556815), (10, 2045452), (20, 1022726), (40, 511363), (61, 335320), (83, 246440), (101, 202520), (122, 167660), (166, 123220), (202, 101260), (244, 83830), (305, 67064), (332, 61610), (404, 50630), (415, 49288), (488, 41915), (505, 40504), (610, 33532), (664, 30805), (808, 25315), (830, 24644), (1010, 20252), (1220, 16766), (1660, 12322), (2020, 10126), (2440, 8383), (3320, 6161), (4040, 5063)]