28678923

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{97}}^1$

素因数の和:161

約数の個数: 72

約数和(自身を含む): 54364128

約数和(自身を除く): 25685205

約数列:

[1, 3, 7, 9, 13, 19, 21, 39, 57, 63, 91, 97, 117, 133, 171, 247, 273, 291, 361, 399, 679, 741, 819, 873, 1083, 1197, 1261, 1729, 1843, 2037, 2223, 2527, 3249, 3783, 4693, 5187, 5529, 6111, 7581, 8827, 11349, 12901, 14079, 15561, 16587, 22743, 23959, 26481, 32851, 35017, 38703, 42237, 71877, 79443, 98553, 105051, 116109, 167713, 215631, 245119, 295659, 315153, 455221, 503139, 735357, 1365663, 1509417, 2206071, 3186547, 4096989, 9559641, 28678923]

約数ペア:

[(1, 28678923), (3, 9559641), (7, 4096989), (9, 3186547), (13, 2206071), (19, 1509417), (21, 1365663), (39, 735357), (57, 503139), (63, 455221), (91, 315153), (97, 295659), (117, 245119), (133, 215631), (171, 167713), (247, 116109), (273, 105051), (291, 98553), (361, 79443), (399, 71877), (679, 42237), (741, 38703), (819, 35017), (873, 32851), (1083, 26481), (1197, 23959), (1261, 22743), (1729, 16587), (1843, 15561), (2037, 14079), (2223, 12901), (2527, 11349), (3249, 8827), (3783, 7581), (4693, 6111), (5187, 5529)]