20908160

素因数分解:

$2^7\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{359}}^1$

素因数の和:398

約数の個数: 128

約数和(自身を含む): 61689600

約数和(自身を除く): 40781440

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 26, 28, 32, 35, 40, 52, 56, 64, 65, 70, 80, 91, 104, 112, 128, 130, 140, 160, 182, 208, 224, 260, 280, 320, 359, 364, 416, 448, 455, 520, 560, 640, 718, 728, 832, 896, 910, 1040, 1120, 1436, 1456, 1664, 1795, 1820, 2080, 2240, 2513, 2872, 2912, 3590, 3640, 4160, 4480, 4667, 5026, 5744, 5824, 7180, 7280, 8320, 9334, 10052, 11488, 11648, 12565, 14360, 14560, 18668, 20104, 22976, 23335, 25130, 28720, 29120, 32669, 37336, 40208, 45952, 46670, 50260, 57440, 58240, 65338, 74672, 80416, 93340, 100520, 114880, 130676, 149344, 160832, 163345, 186680, 201040, 229760, 261352, 298688, 321664, 326690, 373360, 402080, 522704, 597376, 653380, 746720, 804160, 1045408, 1306760, 1493440, 1608320, 2090816, 2613520, 2986880, 4181632, 5227040, 10454080, 20908160]

約数ペア:

[(1, 20908160), (2, 10454080), (4, 5227040), (5, 4181632), (7, 2986880), (8, 2613520), (10, 2090816), (13, 1608320), (14, 1493440), (16, 1306760), (20, 1045408), (26, 804160), (28, 746720), (32, 653380), (35, 597376), (40, 522704), (52, 402080), (56, 373360), (64, 326690), (65, 321664), (70, 298688), (80, 261352), (91, 229760), (104, 201040), (112, 186680), (128, 163345), (130, 160832), (140, 149344), (160, 130676), (182, 114880), (208, 100520), (224, 93340), (260, 80416), (280, 74672), (320, 65338), (359, 58240), (364, 57440), (416, 50260), (448, 46670), (455, 45952), (520, 40208), (560, 37336), (640, 32669), (718, 29120), (728, 28720), (832, 25130), (896, 23335), (910, 22976), (1040, 20104), (1120, 18668), (1436, 14560), (1456, 14360), (1664, 12565), (1795, 11648), (1820, 11488), (2080, 10052), (2240, 9334), (2513, 8320), (2872, 7280), (2912, 7180), (3590, 5824), (3640, 5744), (4160, 5026), (4480, 4667)]