320739640

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{101}}^1\times {\mathrm{197}}^1$

素因数の和:353

約数の個数: 128

約数和(自身を含む): 814302720

約数和(自身を除く): 493563080

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 31, 40, 52, 62, 65, 101, 104, 124, 130, 155, 197, 202, 248, 260, 310, 394, 403, 404, 505, 520, 620, 788, 806, 808, 985, 1010, 1240, 1313, 1576, 1612, 1970, 2015, 2020, 2561, 2626, 3131, 3224, 3940, 4030, 4040, 5122, 5252, 6107, 6262, 6565, 7880, 8060, 10244, 10504, 12214, 12524, 12805, 13130, 15655, 16120, 19897, 20488, 24428, 25048, 25610, 26260, 30535, 31310, 39794, 40703, 48856, 51220, 52520, 61070, 62620, 79391, 79588, 81406, 99485, 102440, 122140, 125240, 158782, 159176, 162812, 198970, 203515, 244280, 258661, 317564, 325624, 396955, 397940, 407030, 517322, 616807, 635128, 793910, 795880, 814060, 1034644, 1233614, 1293305, 1587820, 1628120, 2069288, 2467228, 2586610, 3084035, 3175640, 4934456, 5173220, 6168070, 8018491, 10346440, 12336140, 16036982, 24672280, 32073964, 40092455, 64147928, 80184910, 160369820, 320739640]

約数ペア:

[(1, 320739640), (2, 160369820), (4, 80184910), (5, 64147928), (8, 40092455), (10, 32073964), (13, 24672280), (20, 16036982), (26, 12336140), (31, 10346440), (40, 8018491), (52, 6168070), (62, 5173220), (65, 4934456), (101, 3175640), (104, 3084035), (124, 2586610), (130, 2467228), (155, 2069288), (197, 1628120), (202, 1587820), (248, 1293305), (260, 1233614), (310, 1034644), (394, 814060), (403, 795880), (404, 793910), (505, 635128), (520, 616807), (620, 517322), (788, 407030), (806, 397940), (808, 396955), (985, 325624), (1010, 317564), (1240, 258661), (1313, 244280), (1576, 203515), (1612, 198970), (1970, 162812), (2015, 159176), (2020, 158782), (2561, 125240), (2626, 122140), (3131, 102440), (3224, 99485), (3940, 81406), (4030, 79588), (4040, 79391), (5122, 62620), (5252, 61070), (6107, 52520), (6262, 51220), (6565, 48856), (7880, 40703), (8060, 39794), (10244, 31310), (10504, 30535), (12214, 26260), (12524, 25610), (12805, 25048), (13130, 24428), (15655, 20488), (16120, 19897)]