20778940

素因数分解:

$2^2\times 5^1\times 7^3\times {\mathrm{13}}^1\times {\mathrm{233}}^1$

素因数の和:276

約数の個数: 96

約数和(自身を含む): 55036800

約数和(自身を除く): 34257860

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, 233, 245, 260, 343, 364, 455, 466, 490, 637, 686, 910, 932, 980, 1165, 1274, 1372, 1631, 1715, 1820, 2330, 2548, 3029, 3185, 3262, 3430, 4459, 4660, 6058, 6370, 6524, 6860, 8155, 8918, 11417, 12116, 12740, 15145, 16310, 17836, 21203, 22295, 22834, 30290, 32620, 42406, 44590, 45668, 57085, 60580, 79919, 84812, 89180, 106015, 114170, 148421, 159838, 212030, 228340, 296842, 319676, 399595, 424060, 593684, 742105, 799190, 1038947, 1484210, 1598380, 2077894, 2968420, 4155788, 5194735, 10389470, 20778940]

約数ペア:

[(1, 20778940), (2, 10389470), (4, 5194735), (5, 4155788), (7, 2968420), (10, 2077894), (13, 1598380), (14, 1484210), (20, 1038947), (26, 799190), (28, 742105), (35, 593684), (49, 424060), (52, 399595), (65, 319676), (70, 296842), (91, 228340), (98, 212030), (130, 159838), (140, 148421), (182, 114170), (196, 106015), (233, 89180), (245, 84812), (260, 79919), (343, 60580), (364, 57085), (455, 45668), (466, 44590), (490, 42406), (637, 32620), (686, 30290), (910, 22834), (932, 22295), (980, 21203), (1165, 17836), (1274, 16310), (1372, 15145), (1631, 12740), (1715, 12116), (1820, 11417), (2330, 8918), (2548, 8155), (3029, 6860), (3185, 6524), (3262, 6370), (3430, 6058), (4459, 4660)]