21845915

素因数分解:

$5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{19}}^3$

素因数の和:89

約数の個数: 48

約数和(自身を含む): 34665120

約数和(自身を除く): 12819205

約数列:

[1, 5, 7, 13, 19, 35, 49, 65, 91, 95, 133, 245, 247, 361, 455, 637, 665, 931, 1235, 1729, 1805, 2527, 3185, 4655, 4693, 6859, 8645, 12103, 12635, 17689, 23465, 32851, 34295, 48013, 60515, 88445, 89167, 164255, 229957, 240065, 336091, 445835, 624169, 1149785, 1680455, 3120845, 4369183, 21845915]

約数ペア:

[(1, 21845915), (5, 4369183), (7, 3120845), (13, 1680455), (19, 1149785), (35, 624169), (49, 445835), (65, 336091), (91, 240065), (95, 229957), (133, 164255), (245, 89167), (247, 88445), (361, 60515), (455, 48013), (637, 34295), (665, 32851), (931, 23465), (1235, 17689), (1729, 12635), (1805, 12103), (2527, 8645), (3185, 6859), (4655, 4693)]