20972960

素因数分解:

$2^5\times 5^1\times {\mathrm{19}}^1\times {\mathrm{6899}}^1$

素因数の和:6933

約数の個数: 48

約数和(自身を含む): 52164000

約数和(自身を除く): 31191040

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 76, 80, 95, 152, 160, 190, 304, 380, 608, 760, 1520, 3040, 6899, 13798, 27596, 34495, 55192, 68990, 110384, 131081, 137980, 220768, 262162, 275960, 524324, 551920, 655405, 1048648, 1103840, 1310810, 2097296, 2621620, 4194592, 5243240, 10486480, 20972960]

約数ペア:

[(1, 20972960), (2, 10486480), (4, 5243240), (5, 4194592), (8, 2621620), (10, 2097296), (16, 1310810), (19, 1103840), (20, 1048648), (32, 655405), (38, 551920), (40, 524324), (76, 275960), (80, 262162), (95, 220768), (152, 137980), (160, 131081), (190, 110384), (304, 68990), (380, 55192), (608, 34495), (760, 27596), (1520, 13798), (3040, 6899)]