20994675

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{353}}^1$

素因数の和:440

約数の個数: 48

約数和(自身を含む): 38101728

約数和(自身を除く): 17107053

約数列:

[1, 3, 5, 13, 15, 25, 39, 61, 65, 75, 183, 195, 305, 325, 353, 793, 915, 975, 1059, 1525, 1765, 2379, 3965, 4575, 4589, 5295, 8825, 11895, 13767, 19825, 21533, 22945, 26475, 59475, 64599, 68835, 107665, 114725, 279929, 322995, 344175, 538325, 839787, 1399645, 1614975, 4198935, 6998225, 20994675]

約数ペア:

[(1, 20994675), (3, 6998225), (5, 4198935), (13, 1614975), (15, 1399645), (25, 839787), (39, 538325), (61, 344175), (65, 322995), (75, 279929), (183, 114725), (195, 107665), (305, 68835), (325, 64599), (353, 59475), (793, 26475), (915, 22945), (975, 21533), (1059, 19825), (1525, 13767), (1765, 11895), (2379, 8825), (3965, 5295), (4575, 4589)]