28639821

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{179}}^1\times {\mathrm{401}}^1$

素因数の和:609

約数の個数: 32

約数和(自身を含む): 46310400

約数和(自身を除く): 17670579

約数列:

[1, 3, 7, 19, 21, 57, 133, 179, 399, 401, 537, 1203, 1253, 2807, 3401, 3759, 7619, 8421, 10203, 22857, 23807, 53333, 71421, 71779, 159999, 215337, 502453, 1363801, 1507359, 4091403, 9546607, 28639821]

約数ペア:

[(1, 28639821), (3, 9546607), (7, 4091403), (19, 1507359), (21, 1363801), (57, 502453), (133, 215337), (179, 159999), (399, 71779), (401, 71421), (537, 53333), (1203, 23807), (1253, 22857), (2807, 10203), (3401, 8421), (3759, 7619)]