278381740

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{21851}}^1$

素因数の和:21887

約数の個数: 72

約数和(自身を含む): 732391632

約数和(自身を除く): 454009892

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 49, 52, 65, 70, 91, 98, 130, 140, 182, 196, 245, 260, 364, 455, 490, 637, 910, 980, 1274, 1820, 2548, 3185, 6370, 12740, 21851, 43702, 87404, 109255, 152957, 218510, 284063, 305914, 437020, 568126, 611828, 764785, 1070699, 1136252, 1420315, 1529570, 1988441, 2141398, 2840630, 3059140, 3976882, 4282796, 5353495, 5681260, 7953764, 9942205, 10706990, 13919087, 19884410, 21413980, 27838174, 39768820, 55676348, 69595435, 139190870, 278381740]

約数ペア:

[(1, 278381740), (2, 139190870), (4, 69595435), (5, 55676348), (7, 39768820), (10, 27838174), (13, 21413980), (14, 19884410), (20, 13919087), (26, 10706990), (28, 9942205), (35, 7953764), (49, 5681260), (52, 5353495), (65, 4282796), (70, 3976882), (91, 3059140), (98, 2840630), (130, 2141398), (140, 1988441), (182, 1529570), (196, 1420315), (245, 1136252), (260, 1070699), (364, 764785), (455, 611828), (490, 568126), (637, 437020), (910, 305914), (980, 284063), (1274, 218510), (1820, 152957), (2548, 109255), (3185, 87404), (6370, 43702), (12740, 21851)]