28120760

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{163}}^1\times {\mathrm{227}}^1$

素因数の和:420

約数の個数: 64

約数和(自身を含む): 67305600

約数和(自身を除く): 39184840

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 163, 190, 227, 326, 380, 454, 652, 760, 815, 908, 1135, 1304, 1630, 1816, 2270, 3097, 3260, 4313, 4540, 6194, 6520, 8626, 9080, 12388, 15485, 17252, 21565, 24776, 30970, 34504, 37001, 43130, 61940, 74002, 86260, 123880, 148004, 172520, 185005, 296008, 370010, 703019, 740020, 1406038, 1480040, 2812076, 3515095, 5624152, 7030190, 14060380, 28120760]

約数ペア:

[(1, 28120760), (2, 14060380), (4, 7030190), (5, 5624152), (8, 3515095), (10, 2812076), (19, 1480040), (20, 1406038), (38, 740020), (40, 703019), (76, 370010), (95, 296008), (152, 185005), (163, 172520), (190, 148004), (227, 123880), (326, 86260), (380, 74002), (454, 61940), (652, 43130), (760, 37001), (815, 34504), (908, 30970), (1135, 24776), (1304, 21565), (1630, 17252), (1816, 15485), (2270, 12388), (3097, 9080), (3260, 8626), (4313, 6520), (4540, 6194)]