28028553

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{199}}^1\times {\mathrm{353}}^1$

素因数の和:581

約数の個数: 32

約数和(自身を含む): 45312000

約数和(自身を除く): 17283447

約数列:

[1, 3, 7, 19, 21, 57, 133, 199, 353, 399, 597, 1059, 1393, 2471, 3781, 4179, 6707, 7413, 11343, 20121, 26467, 46949, 70247, 79401, 140847, 210741, 491729, 1334693, 1475187, 4004079, 9342851, 28028553]

約数ペア:

[(1, 28028553), (3, 9342851), (7, 4004079), (19, 1475187), (21, 1334693), (57, 491729), (133, 210741), (199, 140847), (353, 79401), (399, 70247), (597, 46949), (1059, 26467), (1393, 20121), (2471, 11343), (3781, 7413), (4179, 6707)]