21795020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{4931}}^1$

素因数の和:4970

約数の個数: 48

約数和(自身を含む): 52200288

約数和(自身を除く): 30405268

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 26, 34, 52, 65, 68, 85, 130, 170, 221, 260, 340, 442, 884, 1105, 2210, 4420, 4931, 9862, 19724, 24655, 49310, 64103, 83827, 98620, 128206, 167654, 256412, 320515, 335308, 419135, 641030, 838270, 1089751, 1282060, 1676540, 2179502, 4359004, 5448755, 10897510, 21795020]

約数ペア:

[(1, 21795020), (2, 10897510), (4, 5448755), (5, 4359004), (10, 2179502), (13, 1676540), (17, 1282060), (20, 1089751), (26, 838270), (34, 641030), (52, 419135), (65, 335308), (68, 320515), (85, 256412), (130, 167654), (170, 128206), (221, 98620), (260, 83827), (340, 64103), (442, 49310), (884, 24655), (1105, 19724), (2210, 9862), (4420, 4931)]