640132240

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{439}}^1\times {\mathrm{1657}}^1$

素因数の和:2120

約数の個数: 80

約数和(自身を含む): 1628288640

約数和(自身を除く): 988156400

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 439, 440, 878, 880, 1657, 1756, 2195, 3314, 3512, 4390, 4829, 6628, 7024, 8285, 8780, 9658, 13256, 16570, 17560, 18227, 19316, 24145, 26512, 33140, 35120, 36454, 38632, 48290, 66280, 72908, 77264, 91135, 96580, 132560, 145816, 182270, 193160, 291632, 364540, 386320, 727423, 729080, 1454846, 1458160, 2909692, 3637115, 5819384, 7274230, 8001653, 11638768, 14548460, 16003306, 29096920, 32006612, 40008265, 58193840, 64013224, 80016530, 128026448, 160033060, 320066120, 640132240]

約数ペア:

[(1, 640132240), (2, 320066120), (4, 160033060), (5, 128026448), (8, 80016530), (10, 64013224), (11, 58193840), (16, 40008265), (20, 32006612), (22, 29096920), (40, 16003306), (44, 14548460), (55, 11638768), (80, 8001653), (88, 7274230), (110, 5819384), (176, 3637115), (220, 2909692), (439, 1458160), (440, 1454846), (878, 729080), (880, 727423), (1657, 386320), (1756, 364540), (2195, 291632), (3314, 193160), (3512, 182270), (4390, 145816), (4829, 132560), (6628, 96580), (7024, 91135), (8285, 77264), (8780, 72908), (9658, 66280), (13256, 48290), (16570, 38632), (17560, 36454), (18227, 35120), (19316, 33140), (24145, 26512)]