20904520

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{5743}}^1$

素因数の和:5774

約数の個数: 64

約数和(自身を含む): 57899520

約数和(自身を除く): 36995000

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 20, 26, 28, 35, 40, 52, 56, 65, 70, 91, 104, 130, 140, 182, 260, 280, 364, 455, 520, 728, 910, 1820, 3640, 5743, 11486, 22972, 28715, 40201, 45944, 57430, 74659, 80402, 114860, 149318, 160804, 201005, 229720, 298636, 321608, 373295, 402010, 522613, 597272, 746590, 804020, 1045226, 1493180, 1608040, 2090452, 2613065, 2986360, 4180904, 5226130, 10452260, 20904520]

約数ペア:

[(1, 20904520), (2, 10452260), (4, 5226130), (5, 4180904), (7, 2986360), (8, 2613065), (10, 2090452), (13, 1608040), (14, 1493180), (20, 1045226), (26, 804020), (28, 746590), (35, 597272), (40, 522613), (52, 402010), (56, 373295), (65, 321608), (70, 298636), (91, 229720), (104, 201005), (130, 160804), (140, 149318), (182, 114860), (260, 80402), (280, 74659), (364, 57430), (455, 45944), (520, 40201), (728, 28715), (910, 22972), (1820, 11486), (3640, 5743)]