20325760

素因数分解:

$2^7\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{349}}^1$

素因数の和:388

約数の個数: 128

約数和(自身を含む): 59976000

約数和(自身を除く): 39650240

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, 349, 364, 416, 448, 455, 520, 560, 640, 698, 728, 832, 896, 910, 1040, 1120, 1396, 1456, 1664, 1745, 1820, 2080, 2240, 2443, 2792, 2912, 3490, 3640, 4160, 4480, 4537, 4886, 5584, 5824, 6980, 7280, 8320, 9074, 9772, 11168, 11648, 12215, 13960, 14560, 18148, 19544, 22336, 22685, 24430, 27920, 29120, 31759, 36296, 39088, 44672, 45370, 48860, 55840, 58240, 63518, 72592, 78176, 90740, 97720, 111680, 127036, 145184, 156352, 158795, 181480, 195440, 223360, 254072, 290368, 312704, 317590, 362960, 390880, 508144, 580736, 635180, 725920, 781760, 1016288, 1270360, 1451840, 1563520, 2032576, 2540720, 2903680, 4065152, 5081440, 10162880, 20325760]

約数ペア:

[(1, 20325760), (2, 10162880), (4, 5081440), (5, 4065152), (7, 2903680), (8, 2540720), (10, 2032576), (13, 1563520), (14, 1451840), (16, 1270360), (20, 1016288), (26, 781760), (28, 725920), (32, 635180), (35, 580736), (40, 508144), (52, 390880), (56, 362960), (64, 317590), (65, 312704), (70, 290368), (80, 254072), (91, 223360), (104, 195440), (112, 181480), (128, 158795), (130, 156352), (140, 145184), (160, 127036), (182, 111680), (208, 97720), (224, 90740), (260, 78176), (280, 72592), (320, 63518), (349, 58240), (364, 55840), (416, 48860), (448, 45370), (455, 44672), (520, 39088), (560, 36296), (640, 31759), (698, 29120), (728, 27920), (832, 24430), (896, 22685), (910, 22336), (1040, 19544), (1120, 18148), (1396, 14560), (1456, 13960), (1664, 12215), (1745, 11648), (1820, 11168), (2080, 9772), (2240, 9074), (2443, 8320), (2792, 7280), (2912, 6980), (3490, 5824), (3640, 5584), (4160, 4886), (4480, 4537)]