20438908

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{373}}^1$

素因数の和:506

約数の個数: 48

約数和(自身を含む): 43563520

約数和(自身を除く): 23124612

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 76, 103, 133, 206, 266, 373, 412, 532, 721, 746, 1442, 1492, 1957, 2611, 2884, 3914, 5222, 7087, 7828, 10444, 13699, 14174, 27398, 28348, 38419, 49609, 54796, 76838, 99218, 153676, 198436, 268933, 537866, 729961, 1075732, 1459922, 2919844, 5109727, 10219454, 20438908]

約数ペア:

[(1, 20438908), (2, 10219454), (4, 5109727), (7, 2919844), (14, 1459922), (19, 1075732), (28, 729961), (38, 537866), (76, 268933), (103, 198436), (133, 153676), (206, 99218), (266, 76838), (373, 54796), (412, 49609), (532, 38419), (721, 28348), (746, 27398), (1442, 14174), (1492, 13699), (1957, 10444), (2611, 7828), (2884, 7087), (3914, 5222)]