21211120

素因数分解:

$2^4\times 5^1\times 7^3\times {\mathrm{773}}^1$

素因数の和:807

約数の個数: 80

約数和(自身を含む): 57585600

約数和(自身を除く): 36374480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 112, 140, 196, 245, 280, 343, 392, 490, 560, 686, 773, 784, 980, 1372, 1546, 1715, 1960, 2744, 3092, 3430, 3865, 3920, 5411, 5488, 6184, 6860, 7730, 10822, 12368, 13720, 15460, 21644, 27055, 27440, 30920, 37877, 43288, 54110, 61840, 75754, 86576, 108220, 151508, 189385, 216440, 265139, 303016, 378770, 432880, 530278, 606032, 757540, 1060556, 1325695, 1515080, 2121112, 2651390, 3030160, 4242224, 5302780, 10605560, 21211120]

約数ペア:

[(1, 21211120), (2, 10605560), (4, 5302780), (5, 4242224), (7, 3030160), (8, 2651390), (10, 2121112), (14, 1515080), (16, 1325695), (20, 1060556), (28, 757540), (35, 606032), (40, 530278), (49, 432880), (56, 378770), (70, 303016), (80, 265139), (98, 216440), (112, 189385), (140, 151508), (196, 108220), (245, 86576), (280, 75754), (343, 61840), (392, 54110), (490, 43288), (560, 37877), (686, 30920), (773, 27440), (784, 27055), (980, 21644), (1372, 15460), (1546, 13720), (1715, 12368), (1960, 10822), (2744, 7730), (3092, 6860), (3430, 6184), (3865, 5488), (3920, 5411)]