28071980

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{71}}^1\times {\mathrm{373}}^1$

素因数の和:506

約数の個数: 48

約数和(自身を含む): 61072704

約数和(自身を除く): 33000724

約数列:

[1, 2, 4, 5, 10, 20, 53, 71, 106, 142, 212, 265, 284, 355, 373, 530, 710, 746, 1060, 1420, 1492, 1865, 3730, 3763, 7460, 7526, 15052, 18815, 19769, 26483, 37630, 39538, 52966, 75260, 79076, 98845, 105932, 132415, 197690, 264830, 395380, 529660, 1403599, 2807198, 5614396, 7017995, 14035990, 28071980]

約数ペア:

[(1, 28071980), (2, 14035990), (4, 7017995), (5, 5614396), (10, 2807198), (20, 1403599), (53, 529660), (71, 395380), (106, 264830), (142, 197690), (212, 132415), (265, 105932), (284, 98845), (355, 79076), (373, 75260), (530, 52966), (710, 39538), (746, 37630), (1060, 26483), (1420, 19769), (1492, 18815), (1865, 15052), (3730, 7526), (3763, 7460)]