21091730007

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{83}}^1\times {\mathrm{199}}^1\times {\mathrm{521}}^1$

素因数の和:868

約数の個数: 64

約数和(自身を含む): 30868992000

約数和(自身を除く): 9777261993

約数列:

[1, 3, 19, 43, 57, 83, 129, 199, 249, 521, 597, 817, 1563, 1577, 2451, 3569, 3781, 4731, 8557, 9899, 10707, 11343, 16517, 22403, 25671, 29697, 43243, 49551, 67209, 67811, 103679, 129729, 162583, 203433, 311037, 313823, 425657, 487749, 710231, 821617, 941469, 1276971, 1859449, 1969901, 2130693, 2464851, 4458197, 5578347, 5909703, 8605357, 13374591, 13494389, 25816071, 35329531, 40483167, 84705743, 105988593, 163501783, 254117229, 370030351, 490505349, 1110091053, 7030576669, 21091730007]

約数ペア:

[(1, 21091730007), (3, 7030576669), (19, 1110091053), (43, 490505349), (57, 370030351), (83, 254117229), (129, 163501783), (199, 105988593), (249, 84705743), (521, 40483167), (597, 35329531), (817, 25816071), (1563, 13494389), (1577, 13374591), (2451, 8605357), (3569, 5909703), (3781, 5578347), (4731, 4458197), (8557, 2464851), (9899, 2130693), (10707, 1969901), (11343, 1859449), (16517, 1276971), (22403, 941469), (25671, 821617), (29697, 710231), (43243, 487749), (49551, 425657), (67209, 313823), (67811, 311037), (103679, 203433), (129729, 162583)]