20405560

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{359}}^1$

素因数の和:413

約数の個数: 96

約数和(自身を含む): 55404000

約数和(自身を除く): 34998440

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 29, 35, 40, 49, 56, 58, 70, 98, 116, 140, 145, 196, 203, 232, 245, 280, 290, 359, 392, 406, 490, 580, 718, 812, 980, 1015, 1160, 1421, 1436, 1624, 1795, 1960, 2030, 2513, 2842, 2872, 3590, 4060, 5026, 5684, 7105, 7180, 8120, 10052, 10411, 11368, 12565, 14210, 14360, 17591, 20104, 20822, 25130, 28420, 35182, 41644, 50260, 52055, 56840, 70364, 72877, 83288, 87955, 100520, 104110, 140728, 145754, 175910, 208220, 291508, 351820, 364385, 416440, 510139, 583016, 703640, 728770, 1020278, 1457540, 2040556, 2550695, 2915080, 4081112, 5101390, 10202780, 20405560]

約数ペア:

[(1, 20405560), (2, 10202780), (4, 5101390), (5, 4081112), (7, 2915080), (8, 2550695), (10, 2040556), (14, 1457540), (20, 1020278), (28, 728770), (29, 703640), (35, 583016), (40, 510139), (49, 416440), (56, 364385), (58, 351820), (70, 291508), (98, 208220), (116, 175910), (140, 145754), (145, 140728), (196, 104110), (203, 100520), (232, 87955), (245, 83288), (280, 72877), (290, 70364), (359, 56840), (392, 52055), (406, 50260), (490, 41644), (580, 35182), (718, 28420), (812, 25130), (980, 20822), (1015, 20104), (1160, 17591), (1421, 14360), (1436, 14210), (1624, 12565), (1795, 11368), (1960, 10411), (2030, 10052), (2513, 8120), (2842, 7180), (2872, 7105), (3590, 5684), (4060, 5026)]