21931520

素因数分解:

$2^9\times 5^1\times {\mathrm{13}}^1\times {\mathrm{659}}^1$

素因数の和:695

約数の個数: 80

約数和(自身を含む): 56715120

約数和(自身を除く): 34783600

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 160, 208, 256, 260, 320, 416, 512, 520, 640, 659, 832, 1040, 1280, 1318, 1664, 2080, 2560, 2636, 3295, 3328, 4160, 5272, 6590, 6656, 8320, 8567, 10544, 13180, 16640, 17134, 21088, 26360, 33280, 34268, 42176, 42835, 52720, 68536, 84352, 85670, 105440, 137072, 168704, 171340, 210880, 274144, 337408, 342680, 421760, 548288, 685360, 843520, 1096576, 1370720, 1687040, 2193152, 2741440, 4386304, 5482880, 10965760, 21931520]

約数ペア:

[(1, 21931520), (2, 10965760), (4, 5482880), (5, 4386304), (8, 2741440), (10, 2193152), (13, 1687040), (16, 1370720), (20, 1096576), (26, 843520), (32, 685360), (40, 548288), (52, 421760), (64, 342680), (65, 337408), (80, 274144), (104, 210880), (128, 171340), (130, 168704), (160, 137072), (208, 105440), (256, 85670), (260, 84352), (320, 68536), (416, 52720), (512, 42835), (520, 42176), (640, 34268), (659, 33280), (832, 26360), (1040, 21088), (1280, 17134), (1318, 16640), (1664, 13180), (2080, 10544), (2560, 8567), (2636, 8320), (3295, 6656), (3328, 6590), (4160, 5272)]