20903988

素因数分解:

$2^2\times 3^1\times 7^2\times {\mathrm{73}}^1\times {\mathrm{487}}^1$

素因数の和:581

約数の個数: 72

約数和(自身を含む): 57634752

約数和(自身を除く): 36730764

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 49, 73, 84, 98, 146, 147, 196, 219, 292, 294, 438, 487, 511, 588, 876, 974, 1022, 1461, 1533, 1948, 2044, 2922, 3066, 3409, 3577, 5844, 6132, 6818, 7154, 10227, 10731, 13636, 14308, 20454, 21462, 23863, 35551, 40908, 42924, 47726, 71102, 71589, 95452, 106653, 142204, 143178, 213306, 248857, 286356, 426612, 497714, 746571, 995428, 1493142, 1741999, 2986284, 3483998, 5225997, 6967996, 10451994, 20903988]

約数ペア:

[(1, 20903988), (2, 10451994), (3, 6967996), (4, 5225997), (6, 3483998), (7, 2986284), (12, 1741999), (14, 1493142), (21, 995428), (28, 746571), (42, 497714), (49, 426612), (73, 286356), (84, 248857), (98, 213306), (146, 143178), (147, 142204), (196, 106653), (219, 95452), (292, 71589), (294, 71102), (438, 47726), (487, 42924), (511, 40908), (588, 35551), (876, 23863), (974, 21462), (1022, 20454), (1461, 14308), (1533, 13636), (1948, 10731), (2044, 10227), (2922, 7154), (3066, 6818), (3409, 6132), (3577, 5844)]