18362020

素因数分解:

$2^2\times 5^1\times {\mathrm{67}}^1\times {\mathrm{71}}^1\times {\mathrm{193}}^1$

素因数の和:340

約数の個数: 48

約数和(自身を含む): 39892608

約数和(自身を除く): 21530588

約数列:

[1, 2, 4, 5, 10, 20, 67, 71, 134, 142, 193, 268, 284, 335, 355, 386, 670, 710, 772, 965, 1340, 1420, 1930, 3860, 4757, 9514, 12931, 13703, 19028, 23785, 25862, 27406, 47570, 51724, 54812, 64655, 68515, 95140, 129310, 137030, 258620, 274060, 918101, 1836202, 3672404, 4590505, 9181010, 18362020]

約数ペア:

[(1, 18362020), (2, 9181010), (4, 4590505), (5, 3672404), (10, 1836202), (20, 918101), (67, 274060), (71, 258620), (134, 137030), (142, 129310), (193, 95140), (268, 68515), (284, 64655), (335, 54812), (355, 51724), (386, 47570), (670, 27406), (710, 25862), (772, 23785), (965, 19028), (1340, 13703), (1420, 12931), (1930, 9514), (3860, 4757)]