1287996820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{727}}^1\times {\mathrm{8053}}^1$

素因数の和:8800

約数の個数: 48

約数和(自身を含む): 2955109248

約数和(自身を除く): 1667112428

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 727, 1454, 2908, 3635, 7270, 7997, 8053, 14540, 15994, 16106, 31988, 32212, 39985, 40265, 79970, 80530, 88583, 159940, 161060, 177166, 354332, 442915, 885830, 1771660, 5854531, 11709062, 23418124, 29272655, 58545310, 64399841, 117090620, 128799682, 257599364, 321999205, 643998410, 1287996820]

約数ペア:

[(1, 1287996820), (2, 643998410), (4, 321999205), (5, 257599364), (10, 128799682), (11, 117090620), (20, 64399841), (22, 58545310), (44, 29272655), (55, 23418124), (110, 11709062), (220, 5854531), (727, 1771660), (1454, 885830), (2908, 442915), (3635, 354332), (7270, 177166), (7997, 161060), (8053, 159940), (14540, 88583), (15994, 80530), (16106, 79970), (31988, 40265), (32212, 39985)]