20459320

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{89}}^1\times {\mathrm{821}}^1$

素因数の和:928

約数の個数: 64

約数和(自身を含む): 53265600

約数和(自身を除く): 32806280

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 89, 140, 178, 280, 356, 445, 623, 712, 821, 890, 1246, 1642, 1780, 2492, 3115, 3284, 3560, 4105, 4984, 5747, 6230, 6568, 8210, 11494, 12460, 16420, 22988, 24920, 28735, 32840, 45976, 57470, 73069, 114940, 146138, 229880, 292276, 365345, 511483, 584552, 730690, 1022966, 1461380, 2045932, 2557415, 2922760, 4091864, 5114830, 10229660, 20459320]

約数ペア:

[(1, 20459320), (2, 10229660), (4, 5114830), (5, 4091864), (7, 2922760), (8, 2557415), (10, 2045932), (14, 1461380), (20, 1022966), (28, 730690), (35, 584552), (40, 511483), (56, 365345), (70, 292276), (89, 229880), (140, 146138), (178, 114940), (280, 73069), (356, 57470), (445, 45976), (623, 32840), (712, 28735), (821, 24920), (890, 22988), (1246, 16420), (1642, 12460), (1780, 11494), (2492, 8210), (3115, 6568), (3284, 6230), (3560, 5747), (4105, 4984)]